PROSTAGLANDIN SYNTHESIS AND INTERMEDIATES FOR USE THEREIN
申请人:ALBERICO Dino
公开号:US20100056807A1
公开(公告)日:2010-03-04
Fused cyclopentane—4-substituted 3,5-dioxalane lactone compounds useful as an intermediate in the synthesis of prostaglandin analogs are provided. The compounds have the formula A:
wherein R represents an aryl group such as p-methoxyphenyl.
This compound can be reacted with a lower alkyl aluminum compound to open the dioxalane ring and reduce the lactone to lactol, without over-reducing to diol. The resulting compound can be functionalized to insert chemical side groups of target prostaglandins, adding the required α-side chain and then the required ω-side chain sequentially and independently of each other. The compounds and process are particularly suitable for preparing lubiprostone.
<i>In Situ</i>Generation of the Coates Catalyst: A Practical and Versatile Catalytic System for the Carbonylation of<i>meso</i>-Epoxides
作者:Prasad Ganji、David J. Doyle、Hasim Ibrahim
DOI:10.1021/ol201043d
日期:2011.6.17
active catalytic system for the carbonylation of meso- and terminal epoxides to β-lactones is described. The active catalyst, analogous to Coates’ catalyst, is generated in situ from commercially available (TPP)CrCl and Co2(CO)8. This practical system circumvents the preparation of air sensitive cobaltate salts, operates at low catalyst loadings, and allows the carbonylation of functionalized, sterically
Nitrogen-containing prostacyclin analogues and compositions containing them
申请人:THE UPJOHN COMPANY
公开号:EP0077209A1
公开(公告)日:1983-04-20
Novel structural analogues of 5,6-dihydro-PGl1, of the formula:
wherein X-Y-Z and A-CR2-R3 are prostaglandin-based side-chains, and the corresponding 10,11-didehydro-11-de- oxy derivatives, can have utility as anti-allergy agents.
Prostaglandin intermediates, their synthesis and their conversion to prostaglandins
申请人:THE UPJOHN COMPANY
公开号:EP0113561A2
公开(公告)日:1984-07-18
Prostaglandins such as 9-deoxo-9-methylene-16,16-dimethyl-PGE2, PGE2 and PGF2α are prepared by a novel process, from D-glucose. The process involves a number of steps, including the preparation of novel intermediates including 2,3-disubstituted-4,5-tetrahydrofurandiols protected with the, for example, 2,2-propylidene radical.