Synthesis of the C1−C9 Fragment of Callipeltoside-A
摘要:
The C1-C9 fragment of callipeltoside (17) was prepared in 12 steps and 7.2% overall yield from bicyclic lactone (+)-4. Key steps include a stereoselective epoxidation and further regiocontrolled nucleophilic opening of the oxirane ring to install two vicinal stereocenters (C5 and C6), and the use of bis(trimethylsilyl) peroxide and a catalytic amount of Sn(IV) chloride for the chemoselective Baeyer-Villiger oxidation of unsaturated cyclopentanone 15.
Microbial oxidation of 7endo-methylbicyclo[3.2.0]hept-2-en-6-one, 7,7-dimethylbicyclo[3.2.0]hept-2-en-6-one and 2exo-bromo-3endo-hydroxy-7,7-dimethylbicyclo[3.2.0]heptan-6-one using Acinetobacter NCIMB 9871
作者:Andrew J. Carnell、Stanley M. Roberts、Vladimir Sik、Andrew J. Willetts
DOI:10.1039/p19910002385
日期:——
A bio-Baeyer–Villiger reaction using Acinetobacter NCIMB 9871 and the bicycloheptanone 2 provided the corresponding substituted oxabicyclooctanones 6 and 7. Similarly the ketones 3 and 9 furnished the lactones 8 and 10 respectively: the lactones 6, 7 and 10 were obtained in states of high optical purity.
C-3 SUBSTITUTED BICYCLOOCTANE BASED HIV PROTEASE INHIBITORS
申请人:Ghosh Arun K.
公开号:US20140148508A1
公开(公告)日:2014-05-29
C3-functionalized-cyclopentanyltetrahydrofuranyl carbamates that inhibit HIV proteolytic enzymes and processes for preparing the compounds are described. Compositions comprising the disclosed compound and methods of using the compounds and/or compositions for treating patients infected with HIV are also described.
C-3 substituted bicyclooctane based HIV protease inhibitors
申请人:Ghosh Arun K.
公开号:US09309213B2
公开(公告)日:2016-04-12
C3-functionalized-cyclopentanyltetrahydrofuranyl carbamates that inhibit HIV proteolytic enzymes and processes for preparing the compounds are described. Compositions comprising the disclosed compound and methods of using the compounds and/or compositions for treating patients infected with HIV are also described.