[EN] STEREOSELECTIVE SYNTHESIS OF CERTAIN TRIFLUOROMETHYL-SUBSTITUTED ALCOHOLS<br/>[FR] SYNTHÈSE STÉRÉOSÉLECTIVE DE CERTAINS ALCOOLS SUBSTITUÉS PAR TRIFLUOROMÉTHYLE
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2009134737A1
公开(公告)日:2009-11-05
A process for stereoselective synthesis of a compound of Formula (I) wherein R1, R2, R3, R4, and R5 are as described herein.
Organic Reactions in Ionic Liquids: Alkylation of Meldrum's Acid
作者:Ce Su、Zhen-Chu Chen、Qin-Guo Zheng
DOI:10.1081/scc-120022170
日期:2003.1.8
Abstract The room temperature ionic liquid N-butylpyridinium tetrafluoroborate, [bpy]BF4 is used as a “green” recyclable alternative to classical molecular solvents for the alkylation of Meldrum's acid.
2,2-bis-(hydroxymethyl)cyclopropylidenemethyl-purines and pyrmindines as antiviral agents
申请人:Zemlicka Jiri
公开号:US20050113393A1
公开(公告)日:2005-05-26
Compounds which are active against viruses have the following formulas:
wherein B is a purine or pyrimidine heterocyclic ring or base. In a preferred embodiment, the purine include 6-aminopurine (adenine), 6-hydroxypurine (hypoxanthine), 2-amino-6-hydroxypurine (guanine), 2,6-diamino-purine, 2-amino-6-azidopurine, 2-amino-6-halo substituted purines such as 2-amino-6-chloropurine, 2-amino-6-fluoropurine, 2-amino-6-alkoxypurines such as 2-amino-6-methoxypurine, 2-amino-6-cyclopropylaminopurine, 2-amino-6-alkylamino or 2-amino-6-dialkylamino substituted purines, 2-amino-6-thiopurine, 2-amino-6-alkylthio substituted purines, 3-deazapurines, 7-deazapurines and 8-azapurines. The pyrimidine incorporates cytosine, uracil and thymine, 5-halo substituted cytosines and uracils, 5-alkyl substituted cytosines and uracils including derivatives with a saturated or unsaturated alkyl group and 6-azapyrimidines.
Described herein are methods for synthesizing heterocyclic, 8-membered ring structures. The methods may allow for preparation of highly substituted 8-membered rings. Also disclosed are heterocyclic, 8-membered ring compounds and pharmaceutical compositions comprising the compounds.
EFFICIENT AND ECONOMIC ASYMMETRIC SYNTHESIS OF NOOTKATONE, TETRAHYDRONOOTKATONE, THEIR PRECURSORS AND DERIVATIVES
申请人:Sauer M. Anne
公开号:US20060235247A1
公开(公告)日:2006-10-19
An inexpensive, stereoselective synthesis for nootkatone, tetrahydronootkatone, and their derivatives is disclosed. The starting materials used in the synthesis are inexpensive. The principal starting material, (−)-β-Pinene, is on the GRAS list (generally recognized as safe).