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.
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.
A compound of formula (I) in solid form, preferably crystalline form.
公式为(I)的化合物,最好是固体形式,尤其是结晶形式。
PROCESS FOR THE PREPARATION OF VITAMIN K2
申请人:Skattebol Lars
公开号:US20110207967A1
公开(公告)日:2011-08-25
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.
Using a combination of Kumada, Suzuki and Biellmann chemistry, various menaquinones can synthesized 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 with a compound of 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.
利用 Kumada、Suzuki 和 Biellmann 化学的组合,可以快速合成各种 menaquinones,而且具有立体化学完整性,为制药市场提供了制备这些维生素 K2 成分的新方法。在一个实施方案中,制备式(I)化合物的工艺是
定义包括一个步骤,其中 (i) 式 (II) 化合物与式 (III) 化合物反应
其中 R 是烷基
LG 是离去基团
m 是 0 至 8 的整数
n 是 0 至 9 的整数;以及
X 是氢、卤化物、羟基或受保护的羟基;
在铜、镍或钯催化剂存在下。