Search

Your search keyword '"Yuhong Ju"' showing total 4 results
Start Over Author "Yuhong Ju" Journal organic letters
4 results on '"Yuhong Ju"'

1. An efficient and simple aqueous N-heterocyclization of aniline derivatives: microwave-assisted synthesis of N-aryl azacycloalkanes

Author

Yuhong Ju and Rajender S. Varma

Subjects
chemistry.chemical_classification, Aqueous solution, Aryl, Organic Chemistry, General Medicine, Biochemistry, Microwave assisted, Pyrrole derivatives, Potassium carbonate, chemistry.chemical_compound, Aniline, chemistry, Microwave irradiation, Organic chemistry, Physical and Theoretical Chemistry, Alkyl
Abstract

[reaction: see text] An efficient and clean synthesis of N-aryl azacycloalkanes from alkyl dihalides and aniline derivatives has been achieved using microwave irradiation in an aqueous potassium carbonate medium. The phase separation can simplify the product isolation and reduce usage of volatile organic solvents.

Published
2005

2. A new halopropargylation of alkynes promoted by boron trihalides. highly stereo- and regioselective syntheses of substituted (Z)-1-halo-1,4-enyne derivatives

Author

Yuhong Ju, Zhongzhi Wu, and George W. Kabalka

Subjects
Enyne, Chemistry, Organic Chemistry, Organic chemistry, Regioselectivity, chemistry.chemical_element, Lithium, General Medicine, Halo, Physical and Theoretical Chemistry, Boron, Biochemistry, Medicinal chemistry
Abstract

[reaction: see text] A new halopropargylation of alkynes promoted by boron trihalides has been developed. Reactions of (Z)-2-halo-1-vinylboron dihalides (generated in situ via reaction of alkynes with boron trihalides) with lithium propargyloxides in CH(2)Cl(2) at room temperature produce the corresponding (Z)-1-halo-1,4-enynes in modest to good yields.

Published
2004

3. A novel titanium tetrahalide-mediated carbon-carbon bond-forming reaction: regioselective synthesis of substituted (E,Z)-1,5-dihalo-1,4-dienes

Author

Yuhong Ju, George W. Kabalka, and Zhongzhi Wu

Subjects
chemistry.chemical_classification, chemistry, Carbon–carbon bond, Organic Chemistry, Alkyne, Regioselectivity, Organic chemistry, chemistry.chemical_element, General Medicine, Physical and Theoretical Chemistry, Biochemistry, Medicinal chemistry, Titanium
Abstract

Reactions of aldehydes with 2 equiv of alkyne in the presence of TiX(4) (X = Cl, Br) regioselectively generated 1,5-dihalo-1,4-dienes in moderate to good yields with high (E,Z)-stereoselectivity. [reaction: see text]

Published
2002

4. A new reaction of aryl aldehydes with aryl acetylenes in the presence of boron trihalides

Author

Zhongzhi Wu, George W. Kabalka, and Yuhong Ju

Subjects
chemistry.chemical_compound, chemistry, Yield (chemistry), Aryl, Organic Chemistry, chemistry.chemical_element, Physical and Theoretical Chemistry, Boron, Biochemistry, Medicinal chemistry, Boron trichloride
Abstract

[reaction: see text]. The reactions of aryl aldehydes with 2 equiv of arylacetylenes in the presence of boron trichloride yield (E,Z)-1,3,5-triaryl-1,5-dichloro-1,4-pentadienes. Reactions carried out in the presence of boron tribromide generate the corresponding (Z,Z)-1,3,5-triaryl-1,5-dibromo-1,4-pentadienes.

Published
2002

Catalog

Books, media, physical & digital resources
See catalog results