Titanium carbenoid-mediated cyclopropanation of allylic alcohols: selectivity and mechanism
作者:M. J. Durán-Peña、J. M. Botubol-Ares、J. R. Hanson、R. Hernández-Galán、I. G. Collado
DOI:10.1039/c5ob00544b
日期:——
A new method for the chemo- and stereoselective conversion of allylic alcohols into the corresponding cyclopropane derivatives has been developed. The cyclopropanation reaction was carried out with an unprecedented titanium carbenoid generated in situ from Nugent's reagent, manganese and methylene diiodide. The reaction involving the participation of an allylic hydroxyl group, proceeded with conservation
TERPENOID ANALOGUES AND USES THEREOF FOR TREATING NEUROLOGICAL CONDITIONS
申请人:Reed Mark A.
公开号:US20130267571A1
公开(公告)日:2013-10-10
The present application provides a terpene analogue of Formula (I) or a pharmaceutically acceptable isomer, salt or ester thereof, and methods and uses thereof for treating neurological conditions such as pain in general and neuropathic pain. These terpene analogues can also be used to treat other electrical disorders in the central and peripheral nervous system. Also provided are methods of synthesizing the terpene analogues of Formula I.
Synthesis, molecular modelling and pharmacological evaluation of novel indole-thiazolidinedione based hybrid analogues as potential pancreatic lipase inhibitors
作者:Ginson George、Prashant S. Auti、Pracheta Sengupta、Nisha Yadav、Atish T. Paul
DOI:10.1080/07391102.2023.2293255
日期:——
A series of novel indole-thiazolidinedione hybrid analogues (7a to 7 u) were synthesised, characterised and evaluated for their potential Pancreatic Lipase (PL) inhibition. Amongst the screened ana...
An all trans-form polyprenol is obtained by;
(A) subjecting a 3,7-dimethyl-6-hydroxy-7-octen-1-ol derivative to five-carbon lengthening reaction m-times which comprises reacting with 2-methyl-3,3-dimethoxy-1-butene and reducing the carbonyl group of the resulting compound, to obtain an allyl alcohol derivative;
(B) halogenating the hydroxyl group of the allyl alcohol derivative to convert it to form an allyl halide derivative;
(C) allowing the allyl halide derivative to react with a polyisoprenyl sulfone derivative to form a sulfonated polyprenol derivative; and
(D) subjecting the sulfonated polyprenol derivative to desulfonylation to obtain the all trans-form polyprenol.
A process for preparing all trans-form polyprenols
申请人:Kuraray Co., Ltd.
公开号:EP1031551A2
公开(公告)日:2000-08-30
The invention refers to a process comprising treating a compound represented by Formula (202):
wherein p and q each represent an integer of 0 or 1 or more; Y and Z each represent a hydrogen atom, or combine to form a carbon-carbon bond; R1 represents an alkyl group or an aryl group; and A represents a protective group of the hydroxyl group;
with an alkali metal and a polycyclic aromatic compound to produce a compound represented by Formula (201):
wherein p, q, Y and Z are as defined above; and R2 represents a hydrogen atom or the same protective group of the hydroxyl group as that represented by A.
本发明涉及一种工艺,包括处理由式(202)代表的化合物:
其中 p 和 q 分别代表 0 或 1 或更多的整数;Y 和 Z 分别代表氢原子,或结合成碳-碳键;R1 代表烷基或芳基;A 代表羟基的保护基团;
用碱金属和多环芳烃化合物生成由式(201)表示的化合物:
其中 p、q、Y 和 Z 如上定义;R2 代表氢原子或与 A 所代表的羟基相同的保护基团。