Stereospecific synthesis of (Z,E)-9,11,13-tetradecatrien-1-yl acetate and aldehyde sex pheromone components of stenoma cecropia and ectomyelois ceratoniae
Novel versatile approach to an enantiopure 19-nor, des-C,D vitamin D3 derivative
作者:Hans Hilpert、Beat Wirz
DOI:10.1016/s0040-4020(00)01035-8
日期:2001.1
A short and efficient de novo route to the des-C,D vitamin D3 derivative 3 (Ro 65-2299), a potential antipsoriatic, has been developed. This route features an assembly strategy so far unexplored in vitamin D chemistry involving a modified Julia olefination of the A-ring ketone 30 and the 2-benzothiazolyl sulfone 60. Construction of the A-ring building block was accomplished by an efficient three-step
申请人:LG CHEM, LTD. 주식회사 엘지화학(120010134563) Corp. No ▼ 110111-2207995BRN ▼107-81-98139
公开号:KR20170004895A
公开(公告)日:2017-01-11
본 발명은 신규한 전이금속 화합물, 상기 전이금속 화합물을 포함하는 촉매 조성물, 및 상기 촉매 조성물을 이용한 폴리올레핀의 제조방법에 관한 것이다. 본 발명에 따르면, 올레핀 중합 반응에서 높은 중합 성능을 구현할 수 있고, 공중합도가 조절된 중저분자량의 폴리올레핀을 중합할 수 있다.
A new process prepares retiferol derivatives of formula I:
1
wherein
A is —C≡C— or —CH═CH—, and
R
1
and R
2
are independently of each other lower alkyl or lower perfluoroalkyl,
one version couples ketones of formula II with compounds of formula III
A second version couples phosphinoxides of formula IV with aldehydes of formula V. Compounds of formula I are useful in the treatment or prevention of hyperproliferative skin diseases and for reversing the conditions associated with photodamage.
Compounds having a structure of Formula I: wherein G, a, Q, L
2
, R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined herein are provided. Uses of such compounds for treatment of various indications, including prostate cancer as well as methods of treatment involving such compounds are also provided.