摘要:
A process for the preparation of a the formula (I): which process comprises the intramolecular cyclopropanation of an epoxide of me formula (II); in the presence of 0.05 to 0.75 equivalents of a secondary amine base and at least one equivalent of an alkyl lithium base, wherein R R1, R2 and R3 are each hydrogen or C1-4 alkyl or R1 and R2 are linked to form- a C3-7 cycloaUcyl or C3-7 cycloalkenyl ring.
摘要:
A process for the preparation of a the formula (I): which process comprises the intramolecular cyclopropanation of an epoxide of me formula (II); in the presence of 0.05 to 0.75 equivalents of a secondary amine base and at least one equivalent of an alkyl lithium base, wherein R R1, R2 and R3 are each hydrogen or C1-4 alkyl or R1 and R2 are linked to form- a C3-7 cycloaUcyl or C3-7 cycloalkenyl ring.
摘要:
There is provided stereoselective route to a compound of formula I: wherein R represents H or an alkali metal, Ar1 represents 4-chlorophenyl and Ar2 represents 2,5-difluorophenyl.
摘要:
A novel process for preparing cyclohexanone derivatives of formula (I) is described. The products are useful as gamma secretase inhibitors, or as intermediates in the synthesis of other gamma secretase inhibitors.
摘要:
The present invention relates to the synthesis of intermediates for the preparation of compounds of formula (A): wherein n is 2 or 3 and various salt forms of these compounds. The compounds of formula (A) are useful as ανβ3 receptor antagonists