[EN] DIMETHYL-(3,3-DIFLUORO-2,2-DIHYDROXYHEPTYL)PHOSPHONATE AND PROCESSES FOR ITS PREPARATION [FR] PHOSPHONATE DE DIMÉTHYL-(3,3-DIFLUORO-2,2-DIHYDROXYHEPTYLE) ET SES PROCÉDÉS DE PRÉPARATION
Disclosed is a method for preparing a prostaglandin derivative of formula (A):
which comprises reacting an aldehyde represented by formula (1):
with a 2-oxoalkyl phosphonate in a reaction solvent under the presence of alkali hydroxide as sole base. By carrying out the reaction using an alkali hydroxide as sole base in the reaction system, the desired prostaglandin derivative can be obtained by simple procedures and with high yield.
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.