General Preparation and Controlled Cyclization of Acyclic Terpenoids
摘要:
[GRAPHICS]A general preparation method of the all-(E)-polyprenols 12 has been developed from readily available geranyl sulfone by the chain-extension process utilizing the C-5 unit 5 and the chain-temination process utilizing the C5 unit 10 together with the chemoselective reductive desulfortylation. The polyprenols 12 were converted to compounds 3 containing two consecutive prenyl sulfone moieties at the tail end, which underwent the controlled electrophilic cyclization only at the carbon-carbon double bonds that were remote from the flat and rigid benzenesulfonyl groups.
Palladium-Catalyzed Regio- and Stereoselective Reduction of Allylic Compounds with LiHBEt<sub>3</sub>. Application to the Synthesis of Co-enzyme Q<sub>10</sub>
Regio- and stereoselective desulfonylation of allylic sulfones with LiHBEt3 in the presence of a catalytic amount of [PdCl2(dppp)] was successfully applied to the synthesis of co-enzymeQ10. It was found that this reduction system was applicable to a wide variety of allylic functional groups.
[EN] 3/4-((2E,6E)-3,7,11-TRIMETHYLDODECA-2,6,10-TRIENYLTHIO)BENZAMIDE DERIVATIVE COMPOUNDS<br/>[FR] COMPOSÉS DÉRIVÉS DE 3/4-((2E,6E)-3,7,11-TRIMÉTHYLDODÉCA-2,6,10-TRIÉNYLTHIO)BENZAMIDE
申请人:ANKARA UENIVERSITESI REKTOERLUEGUE
公开号:WO2021126120A1
公开(公告)日:2021-06-24
The present invention relates to 3/4-((2E,6E)-3,7,11-trimethyldodeca-2,6,10-trienylthio)benzamide derivative compounds that are potential RAS (Kirsten Rat Sarcoma Virus) inhibitors and/or potential farnesyl transferase (FTase) inhibitors.
本发明涉及潜在的RAS(Kirsten Rat Sarcoma Virus)抑制剂和/或潜在的法尼基转移酶(FTase)抑制剂的3/4-((2E,6E)-3,7,11-三甲基十二烯基硫代)苯甲酰衍生物化合物。
Phenyl derivatives
申请人:Hoffmann-La Roche Inc.
公开号:US03944531A1
公开(公告)日:1976-03-16
Phenyloxy, phenylsulfinyl, phenylthio, phenylsulfonyl, benzyloxy, benzylthio, benzylsulfinyl, or benzylsulfonyl, alkyl or alkenyl derivatives wherein the alkyl or alkenyl group contains at least 7 carbon atoms which are useful in killing and preventing proliferation of insects by upsetting their hormone balance.
Using a combination of Kumada, Suzuki and Biellmann chemistry, various menaquinones can synthesised rapidly and with stereochemical integrity offering a new way of preparing these vitamin K2 components for the pharmaceutical market. In one embodiment a process for the preparation of a compound of formula (I) is defined including a step in which (i) a compound of formula (II) is reacted formula (III) wherein R is an alkyl group; LG is a leaving group; m is an integer from 0 to 8; n is an integer of from 0 to 9; and X is hydrogen, halide, hydroxyl or protected hydroxyl; in the presence of a copper, nickel or palladium catalyst.
Enzyme-catalysed formation of β-amyrin from a bicyclic isomer of 2,3-epoxysqualene
作者:Hugho Horan、John P. McCormick、Duilio Arigoni
DOI:10.1039/c39730000073
日期:——
A specifically tritiated specimen of the bicyclic epoxide (11) undergoes enzymic cyclization in a homogenate from Pisum sativum to give β-amyrin (5) without randomization of label.