Iterative Cyclopropanation: A Concise Strategy for the Total Synthesis of the Hexacyclopropane Cholesteryl Ester Transfer Protein Inhibitor U-106305
作者:Anthony G. M. Barrett、Dieter Hamprecht、Andrew J. P. White、David J. Williams
DOI:10.1021/ja9708326
日期:1997.9.1
The first enantioselective totalsynthesis of the hexacyclopropane natural product U-106305, which is produced by Streptomyces sp. UC 11136, is described in full detail. Considerations on the biosynthesis of U-106305 and its close resemblance to the pentacyclopropane bacterial metabolite FR-900848 (10) led to the proposal that its previously unknown stereostructure should be represented as 11. The
Pronounced Inhibition Shift from HIV Reverse Transcriptase to Herpetic DNA Polymerases by Increasing the Flexibility of α-Carboxy Nucleoside Phosphonates
nucleobase to the other end of the linker by a Mitsunobu reaction followed by final deprotection. Replacing the cyclopentyl moiety in the prototype α-CNPs by a more flexible entity results in a selectivity shift of ∼100-fold in favor of the herpetic DNA polymerases when compared to selectivity for HIV-1 RT. The nature of the kinetic interaction of the acyclic α-CNPs against the herpetic DNA polymerases differs
Lipase from Mucor miehei (MML) has been selected as the most suitable enzyme to catalyze the efficient monobenzoylation of 1,4-diols using vinyl benzoate as acyltransfer reagent in tert-butyl methyl ether. The regioselectivity of the monobenzoylation of 2-substituted-1,4-diols has been studied as well.
[EN] BIOSYNTHESIS OF CHEMICALLY DIVERSIFIED NON-NATURAL TERPENE PRODUCTS<br/>[FR] BIOSYNTHÈSE DE PRODUITS TERPÉNIQUES NON NATURELS DIVERSIFIÉS CHIMIQUEMENT
申请人:UNIV MICHIGAN STATE
公开号:WO2021092200A1
公开(公告)日:2021-05-14
The disclosure relates to compounds of the formulae (l)-(IV) and their use as substrates for making terpenoids. New substrates for terpene biosynthesis and methods for making new types of terpenes are described herein. Diterpenes occupy a unique molecular space with critical pharmaceutical applications over a diverse spectrum including anti-microbial, anti-cancer, immunomodulatory and psychoactive properties.
Purines and pyrimidines having a fused cyclopropane ring in the side chain and the heterocyclic isosteres of said purines and pyrimidines have antiviral activity, especially against viruses of the herpes class.