105 results on '"Hoffmann, H.M.R."'
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2. Synthetic studies toward the disorazoles: synthesis of a masked northern half of disorazole D 1 and a cyclopropane analog of the masked northern half of disorazole A 1
3. Synthesis and studies of marine natural products: the dictyoxetane core from 8-oxabicyclo[3.2.1]oct-6-en-3-ones
4. Stereocontrolled Synthesis of Heteroannular Acetals from Functionalized 1,5-Enynes via Radical Cascades—Construction of Quaternary and 1,2-Diquaternary Centres in Polycyclic Systems
5. Recalcitrant S N2 Displacements at Carbon C9 of Quincorine and Quincoridine: 1,2-Amino Halides and Mesylates with Configurationally Rigid Nitrogen
6. Chelation-controlled reduction of alpha-methylated 8-oxabicyclo[3.2.1]oct-6-en-3-ones with samarium diiodide. Diastereoselective preparation of secondary alcohols
7. Asymmetric synthesis of polyacetate derived building blocks with α-oxyanion functionality. Lewis acid catalyzed opening of 2,9-dioxabicyclo[3.3.1]nonan-3-ones
8. Synthesis of enantiopure C-glycosides and pseudo C-glycosides: Lewis-acid mediated heterolysis of methyl acetals
9. Asymmetric synthesis of seven-carbon segments of the phorboxazoles and (−)-discodermolide: Complementary route from racemic trans-2,4-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one
10. Stereoselective synthesis of precursors of naturally occuring robustadials A and
11. Crystal structures of ethanol hemisolvates of (1S,3R,4S,8S,9R)-1N-boranyl-6'-methoxy-cinchonan-9-ol,C20H27BN2O2 center dot 1/2C(2)H(5)OH, and (1S,3S,4S,8S,9R)-1N-boranyl-10,11-didehydro-6 '-methoxy-cinchonan-9-ol, C20H25BN2O2 center dot 1/2C(2)H(5)OH
12. Crystal structure of (1S,2R,4S,5S)-5-ethynyl-2-hydroxymethyl-1-azabicyclo[2.2.2]octane, (HC2)(HOCH2)C7H11N)
13. Crystal structure of (1S,2R,5R,6R)-2-methoxy-6-(16-nitrophenylethynyl)-1-azabicyclo[3.2.2]nonane, C17H20N2O3
14. Crystal structure of (1S,2R,4S)-2-bromomethyl-1-azabicyclo[2.2.2]·octan-5-one, C8H12BrNO
15. Crystal structure of (1S,2S,4S,5R)-2-hydroxymethyl-5-ethynyl-1-azabicyclo[ 2.2.2]octane, (HOCH2) (HC2)(C7H11N)
16. Crystal structure of (2S,5R)-1-chloromethyl-2-hydroxymethyl-5-vinyl-1- azoniabicyclo[2.2.2]octane chloride, (C11H19ClNO)Cl
17. Crystal structure of (3S,8R,9R)-3,9-dihydroxy-6'-methoxy-3-phenyl-10,11-dinorcinchonane hemihydrate, (C24H26N2O3) · 0.5H2O
18. Synthetic studies toward the disorazoles: synthesis of a masked northern half of disorazole D1 and a cyclopropane analog of the masked northern half of disorazole A1
19. Crystal structure of 2(R),3(S),4(R),4a(R),4b(R),5(R),8a(S),9a(S)-2- acetoxymethyl-5-tri-methylsilyI-7-iodo-3,4,4a,4b,5,8,8a,9a-octahydro- 2H-pyrano[2,3-b]-benzofuran-3,4-diol diacetate, C21H31lO8Si
20. Recalcitrant SN2 Displacements at Carbon C9 of Quincorine and Quincoridine: 1,2-Amino Halides and Mesylates with Configurationally Rigid Nitrogen
21. Synthesis of dioxatricyclic segments of dictyoxetane. Oxygenated 6,8-dimethyl-2,7-dioxatricyclo[4.2.1.03,8]nonanes show antitumor activity
22. Synthesis of 10,11-didehydro- and 10,11-dihydro-Quincorine and of the Quincoridine analogs: functionalized and enantiopure 1-azabicyclo[2.2.2]-octanes with four stereogenic centers
23. Unified approach towards medium ring allylic ethers. Stereoselective synthesis of 2,10-dialkylated (E)-oxacyclodec-3-enes by palladium catalyzed cyclization
24. Synthesis of oxazatwistanes and their homo- and bishomo-analogues from quinidine — Medium ring systems derived from cinchona alkaloids
25. Acylation and O-sulfonylation of Quincorine® and Quincoridine®. Efficient intramolecular catalysis
26. Synthesis of the C1C9 segment of bryostatin
27. 8-oxabicyclo[3.2.1]oct-6-en-3-one as a module for the synthesis of β-alkoxy-δ-valerolactones relevant to natural products and drugs
28. Diastereocontrol of nucleophilic attack of the rubanone carbonyl group via remote siloxy tether. Establishing the natural configuration at carbon C-3 of Cinchona alkaloids
29. Tandem radical mediated 5-exo-trig, 6-endo-dig cyclization. Stereoselectivity, α-trimethylsilyl effect and the product spread — IV
30. Polyannulated glycopyranosides via radical-mediated tandem reactions. Stereoselective synthesis of 6·5·6 dioxatricycles via 5-exo-trig, 6-endo-dig mode — III
31. Synthesis of bridged nine-membered ring ethers: Studies directed towards the synthesis of eunicellin-based marine diterpenes
32. Asymmetric synthesis of the C(18)C(24) unit of lasonolide A
33. Lipase mediated desymmetrization of meso-2,6-di(acetoxymethyl)-tetrahydropyran-4-one derivatives. An innovative route to enantiopure 2,4,6-trifunctionalized C-glycosides
34. Asymmetric synthesis of the C(10)C(16) segment of the bryostatins
35. Samarium diiodide-mediated pinacolization of 1,4-diketones —I. Stereoselective synthesis of fused mono-, bi- and tricyclic cyclobutane-1,2-diols
36. Samarium diiodide-mediated pinacolization of diketones—II. Synthesis of polycyclic frameworks containing a cyclobutane-1,2-diol and a cyclopentane-1,2-diol
37. Stereoconvergent synthesis of enantiopure (-)-trans-lauthisan. Building kit for medium ring oxacycle construction and contrathermodynamic epimerization at allylic carbon C(8) via “invisible”, E-configurated medium ring olefin
38. Diastereoselective synthesis of functionalized 9-ring ethers (oxonins)
39. The intramolecular enyne diels-alder reaction. Stereoselective construction of tricyclic dioxadienones and mechanistic outline
40. One-pot synthesis of novel monoterpenoid ethers.
41. Synthesis of dioxatricyclic segments of dictyoxetane. Oxygenated 6,8-dimethyl-2,7-dioxatricyclo[4.2.1.0 3,8]nonanes show antitumor activity
42. The crystal and molecular structure and solid state conformation of 2,2,4,4,6,6,-hexamethylcyclohexanetrione
43. Nucleophilic Organosilicon Intermediates Turned Electrophilic: (Trimethylsilyl)methyl, Trimethylsilyloxy and also 2-Tetrahydropyranyloxy as Terminators of Cycloadditions of Allyl Cations. A Short Route to Dehydrozizaenes (6-Methylenetricyclo[6.2.1.01,5]-undec-9,10-enes) and Related Tricycles and [3.2.1]-Bicycles.
44. Functionalized Barbaralanes ring expansion of bicyclo[3.2.1]oct-6-en-3-ones. Heteroatom effects on degenerate cope rearrangements
45. Oxygenated limonene analogs. Preparation of tetramethylated carvone and carveols via regiocontrolled opening of tetramethyllimonene oxide.
46. Two-fold rotational barriers in 1,1,2,2-tetrasubstituted ethanes a dynamic nmr and molecular mechanics study of some highly-branched saturated hydrocarbons
47. Improved procedure for the generation of allyl cations from simple dibromo ketones. Change of mechanism on reaction with triethyl borate amd zinc. Cycloadditions to conjugated dienes.
48. Synthesis and π-facially selective cycloadditions of pinofurans
49. Solvent effects on regioselection in 4+3→7 cyclizations. A stepwise reaction of trans-1,3-pentadiene.
50. Synthesis of cyclobutylideneacetic esters via aluminum chloride promoted [2+2] cycloadditions of ethyl 2,3-butadienoate to olefins
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