Tosylation of some alcohols and phenols has been directly carried out with p-toluenesulfonyl chloride using heterodoxy acids (H3PW12O40, H3PMo12O40, AlPW12O40, and AlPMo12O40) as catalysts in the absence of solvent. We found that heteropoly acids AlPW12O40 and AlPMo12O40 were effective catalysts for the tosylation of alcohols and phenols. In the case of aliphatic alcohols, secondary alcohols undergo
Neryl- and geranyltriethylammonium halides in the allylation of sodium diethyl malonate. The effect of the leaving group of the allylating reagent on the selectivity of the reaction
作者:E. A. Petrushkina、L. I. Zakharkin
DOI:10.1007/bf00695820
日期:1994.2
N-neryl-andN-geranyltriethylammonium halides can allylate sodium diethyl malonate to give terpene malonatederivatives. Using the above-mentioned ammonium salts, geranyl and neryl acetates, geranyl ethyl carbonate, and geranyl diethyl phosphate as examples, it has been shown that with Pd0 and PdII catalysts, the selectivity of the formation of neryl-, geranyl-, and linalylmalonates can be governed
CYCLISATION PROCESS OF FORMING A MULTIPLE RING COMPOUND
申请人:Loh Teck Peng
公开号:US20100228058A1
公开(公告)日:2010-09-09
The present invention relates to a cyclisation process of forming a multiple ring compound from an isoprenoid compound. The cyclisation process involves reacting the isoprenoid compound with an acetal initiator under conditions sufficient to form the multiple ring compound. The isoprenoid compound is contacted with an initiator an optionally with a catalyst. Cyclisation occurs by reaction of the initiator with the isoprenoid compound. Cyclic acetal compounds wherein the acetal forms part of 6-membered unsaturated ring are also defined.
A process for producing geranylgeraniol is provided, which comprises the steps of subjecting a mixture of at least one ester derivative wherein one or more carbon-carbon double bonds in the molecule are in cis form represented by the general formula (1):
wherein R represents an aromatic group which can be substituted with at least one substituent, or a higher aliphatic group having from 7 to 25 carbon atoms, and wavy lines, respectively, represent a state where each carbon-carbon double bond can be present in cis or trans form, and an ester derivative of the general formula (2):
wherein R is as defined above, to crystallization to obtain the ester derivative of the formula (2) selectively, and hydrolyzing the thus obtained ester derivative.
本发明提供了一种生产香叶基橙皮酚的工艺,该工艺包括以下步骤:将至少一种酯衍生物的混合物置于通式(1)中,其中分子中的一个或多个碳碳双键以顺式形式存在:
其中 R 代表可被至少一个取代基取代的芳香族基团或具有 7 至 25 个碳原子的高脂族基团,波浪线分别代表每个碳碳双键可以顺式或反式形式存在的状态,以及通式(2)的酯类衍生物:
其中 R 如上文所定义,结晶以选择性地获得式(2)的酯衍生物,并水解由此获得的酯衍生物。
Recombinant production systems for prenylated polyketides of the cannabinoid family
申请人:BayMedica, Inc.
公开号:US10837031B2
公开(公告)日:2020-11-17
The present invention relates generally to production methods, enzymes and recombinant yeast strains for the biosynthesis of clinically important prenylated polyketides of the cannabinoid family. Using readily available starting materials, heterologous enzymes are used to direct cannabinoid biosynthesis in yeast.