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The development of small organic molecules that can convert light energy into chemical energy to directly promote molecular transformation is of fundamental importance in chemical science. Herein, we report a zwitterionic acridinium amidate as a catalyst for the direct functionalization of aliphatic C−H bonds. This organic zwitterion absorbs visible light to generate the corresponding amidyl radical in the form of excited‐state triplet diradical with prominent reactivity for hydrogen atom transfer to facilitate C−H alkylation with a high turnover number. The experimental and theoretical investigations revealed that the noncovalent interactions between the anionic amidate nitrogen and a pertinent hydrogen‐bond donor, such as hexafluoroisopropanol, are crucial for ensuring the efficient generation of catalytically active species, thereby fully eliciting the distinct reactivity of the acridinium amidate as a photoinduced direct hydrogen atom transfer catalyst. [ABSTRACT FROM AUTHOR]

Alkyne hydroamination is an effective approach for the production of enamines and enamine‐containing N‐heterocycles. However, stereoselectivity control is a considerable challenge in this reaction because of the electronic repulsion between an incoming nitrogen lone pair and the alkyne π‐system. Herein, we propose a methodology involving β‐regio‐ and Z‐selective alkyne hydroamination by using tetrafluoro‐λ6‐sulfanyl (SF4) alkynes under superbasic, naked anion conditions. The reaction is compatible with a wide variety of N‐heterocycles, including indoles, carbazoles, pyrazoles, and imidazoles, and selectively furnishes SF4‐linked Z‐vinyl enamines with β‐regioselectively. Moreover, the method can be extended to the β‐ and Z‐controlled, base‐mediated alkyne hydrophenoxylation with phenols to provide SF4‐linked Z‐vinyl ethers in high yields. As the SF4 unit has attracted attention as a bioisostere for alkynes, p‐benzenes, bicyclo[1.1.1]pentyl (BCP) groups, and cubanes in medicinal chemistry, this chemistry represents an effective approach to creating novel drug candidates incorporating SF4‐containing molecules. [ABSTRACT FROM AUTHOR]

main-duct intraductal papillary mucinous neoplasm (IPMN). The topics discussed include the classification of IPMN types, the challenges in determining the extent of resection in cases with diffuse main pancreatic duct dilatation, and the possibility that the dilatation in the remnant pancreatic head is derived from a secondary effect of the IPMN lesion in the resected pancreas.

The article titled "Cover Picture: Zwitterionic Acridinium Amidate: A Nitrogen-Centered Radical Catalyst for Photoinduced Direct Hydrogen Atom Transfer" discusses the development of an organic zwitterion that acts as a trifunctional photocatalyst. This zwitterion, composed of an acridinium cation and an amidate anion, is able to efficiently functionalize inert aliphatic C-H bonds with electron-deficient olefins under blue-light irradiation. The article also briefly mentions other research topics such as the inhibition of the NLRP3 inflammasome by a naphthopyrone-macrolide hybrid derived from an Antarctic fungus, real-time metabolic flux tracking in pancreatic xenografts via MRI, and the introduction of strong ion-dipole interactions for high-stability Zn anodes in aqueous zinc-ion batteries. [Extracted from the article]

The article in Angewandte Chemie discusses the development of an organic zwitterion catalyst by Takeshi Yanai, Olga García Mancheño, Kohsuke Ohmatsu, Takashi Ooi et al., which enables the functionalization of inert aliphatic C-H bonds with electron-deficient olefins under blue-light irradiation. Additionally, Dehai Li and co-workers report on a potent NLRP3 inflammasome inhibitor derived from an Antarctic fungus, while Jessica Ettedgui and co-workers demonstrate real-time metabolic flux tracking in pancreatic xenografts via MRI. Jianwei Li, Guoliang Chai et al. introduce strong ion-dipole interactions for high-stability Zn anodes in aqueous zinc-ion batteries. [Extracted from the article]

A 77-year-old man presented to our hospital with a chief complaint of stomachache. He received a diagnosis of unresectable advanced gastric cancer classified as cT3, N+, M1(LYM, HEP, OSS), Stage ⅣB. He underwent first-line chemotherapy with SOX, second-line treatment with PTX plus Ram, and third-line treatment with nivolumab. The primary tumor showed a reduction in size, and liver and lymph node metastases were not detectable. However, after 5 years of chemotherapy, a re- enlargement was observed in the primary gastric lesion without progression of liver and lymph node metastases. Subsequently, conversion surgery was performed. Based on the pathological analysis, the diagnosis was ypT1b2(SM2), N0(0/17), M0, ypStage ⅠA, R0. After nivolumab administration postoperatively for 5 months, chemotherapy was discontinued as there was no recurrence.

Alkyne hydroamination is an effective approach for the production of enamines and enamine-containing N-heterocycles. However, stereoselectivity control is a considerable challenge in this reaction because of the electronic repulsion between an incoming nitrogen lone pair and the alkyne π-system. Herein, we propose a methodology involving β-regio- and Z-selective alkyne hydroamination by using tetrafluoro-λ 6 -sulfanyl (SF 4 ) alkynes under superbasic, naked anion conditions. The reaction is compatible with a wide variety of N-heterocycles, including indoles, carbazoles, pyrazoles, and imidazoles, and selectively furnishes SF 4 -linked Z-vinyl enamines with β-regioselectively. Moreover, the method can be extended to the β- and Z-controlled, base-mediated alkyne hydrophenoxylation with phenols to provide SF 4 -linked Z-vinyl ethers in high yields. As the SF 4 unit has attracted attention as a bioisostere for alkynes, p-benzenes, bicyclo[1.1.1]pentyl (BCP) groups, and cubanes in medicinal chemistry, this chemistry represents an effective approach to creating novel drug candidates incorporating SF 4 -containing molecules., (© 2023 Wiley-VCH GmbH.)

Among the cases that underwent primary tumor resection(PTR)of colorectal cancer at our hospital between January 2010 and December 2020, we examined 6 cases that involved ovarian metastasis(OM)surgery. The period from PTR to recurrence of OM was 2-28 months. Bilateral oophorectomy or bilateral salpingo-oophorectomy was performed in 5 cases, and unilateral oophorectomy was performed in 1. The reasons for surgery were symptom development and progressive disease. The period from recurrence of OM to OM surgery was short, that of 0-6 months. In 5 cases, peritoneal dissemination and other distant metastases were observed during OM surgery; R0 resection was performed in 2 cases. Postoperative complications associated with OM surgery were not observed. The median time required from the day of OM surgery to the resumption of chemotherapy was 33 days, and it was possible to resume chemotherapy early. The median survival time after OM surgery was approximately 11 months, which is considered to be owing to the influence of complications of peritoneal dissemination and other distant metastases.

We performed 16 cases of non-colorectal liver metastasis resection(19 resections)between January 2011 and December 2021. Among the 16 cases, the primary lesions were as follows: gastric cancer in 7 cases; GIST in 2 cases; and neuroendocrine tumor, renal cancer, pancreatic cancer(acinic cell carcinoma), cholangiocarcinoma, breast cancer, ovarian cancer, and leiomyosarcoma in 1 case each. The median time from primary lesion resection to the diagnosis of liver metastasis was 20.6 months. In cases of neuroendocrine tumors and renal cancer, hepatectomy was performed with a preoperative diagnosis of hepatocellular carcinoma. Four cases underwent laparoscopic hepatectomy, and 10 cases underwent anatomical liver resection. Postoperative chemotherapy was performed in 8 cases. Recurrence of liver metastasis was observed in 7 cases. One case of gastric cancer and 1 case of neuroendocrine tumor underwent repeat hepatectomy. The median relapse-free survival was 13.8 months, and the median overall survival was 55.7 months.

A 71-year-old woman was hospitalized with loose stools and lightheadedness. She was subsequently diagnosed with sigmoid colon cancer for which we performed a laparoscopic sigmoid colectomy, small intestine partial resection, partial bladder resection, and open conversion. The intraoperative findings and histopathological analysis showed secondary lymph node metastasis in the mesentery of the ileum, and the surgery resulted in R2 resection. Chemotherapy(CAPOX plus Bev) was initiated thereafter, and the L-OHP and Bev were discontinued over time. A complete response was achieved at 1 year postoperative. Capecitabine alone was continued, and no signs of recurrence were noted at 2 years postoperative.

A 73-year-old man underwent distal pancreatectomy for invasive pancreatic ductal carcinoma in 2018. He showed stenosis of sigmoid colon due to recurrence of pancreatic cancer and received transverse colostomy in 2020. One year after initiation of gemcitabine monotherapy, he complained of abdominal pain. CT images and colonoscopy revealed accumulation of mucus in sigmoid colon due to stenotic lesions. Because conservative treatment using antibiotics was not effective, we performed sigmoidectomy. Histological examination revealed that tubular adenocarcinoma located mainly in the muscularis propria invaded into the colonic mucosa. Immunohistochemical analysis showed positive staining for CK7, and negative for CK20. We diagnosed sigmoid colon metastases of pancreatic cancer.

A man in his 70s underwent an endovascular aneurysm repair(EVAR)for abdominal aortic aneurysm. Blood test revealed an anemia and an increased tumor marker. Enhanced computed tomography revealed the wall thickening in the sigmoid colon and the Type Ⅱ endoleak after EVAR. Colonoscopy showed the wall thickening in the sigmoid colon, and biopsy indicated a diagnosis of adenocarcinoma. We performed open sigmoid colectomy with D3 lymph node dissection and ileostomy. We performed intraoperative indocyanine green (ICG) fluorescence method for evaluating the blood flow in the colon before the high ligation of the inferior mesenteric artery and the creation of the anastomosis, and perfusion of the colon was visualized. He was discharged postoperative day 14, and was performed closure of ileostomy 5 months later. Intraoperative ICG fluorescence method was safety and useful for evaluating the blood flow in the colon.

Herein, we report the metal-free hydration of pyridine-SF 4 -alkynes, under acidic conditions and with reaction durations ranging from 5 min to 10 h at room temperature, to synthesize pyridine-SF 4 -methyl ketones in yields of 59-93%. Further, we demonstrate the synthetic applications of the synthesized pyridine-SF 4 -methyl ketones, such as chlorination, NaBH 4 reduction, Baeyer-Villiger oxidation, and the generation of enol-triflates. These compounds hold promise as useful building blocks in the syntheses of a wide range of SF 4 -containing drug candidates.

The patient was a 73-year-old man. Upper gastrointestinal endoscopy revealed a type 3 tumor in the antrum of the stomach. Preoperative CT imaging showed multiple liver metastases(S2, S3, S4, S6, S7). We administered 2 courses of chemotherapy( XP therapy)for the unresectable gastric cancer; the impact of the neoadjuvant therapy was PR. We performed distal gastrectomy and D2 dissection. After gastric resection, we administered an additional 3 courses of XP therapy. Unfortunately, new lesions of liver metastases were recurrent at S5 and S8. The patient was treated with 3 courses of S-1 chemotherapy. However, abdominal CT and EOB-MRI revealed significant tumor growth despite S-1 therapy. We performed S5 sub-segment resection and S8 partial resection due to the absence of new lesions. Histopathological findings revealed that the well-differentiated adenocarcinoma had metastasized to the liver, with Grade 1a tumor destruction. Two years after the initial gastrectomy, no recurrence of gastric cancer was observed.