A process for producing a compound of the formula:
including reacting of a compound of the formula:
with diphenyl phosphine oxide using a binary phase reaction mixture including diphenyl phosphine oxide in an organic solvent, a basic aqueous solution, and a phase transfer catalyst, to obtain the compound of formula 1,
wherein Ph is phenyl, X
1
and X
2
are both hydrogen or X
1
and X
2
taken together are CH
2
, R
1
is a protecting group, R
2
is fluorine, hydrogen, or OR
3
, wherein R
3
is a protecting group, and the squiggly line represents a bond that results in the adjacent double bond being in either the E or Z configuration, is disclosed.
本发明涉及一种制备式化合物的方法,包括使用二元相反应混合物,包括
二苯基膦氧化物在有机溶剂、碱性
水溶液和相转移催化剂的情况下,与式化合物反应:以获得式1的化合物,其中Ph表示苯基,X1和X2均为氢或X1和X2共同为
CH2,R1为保护基,R2为
氟、氢或OR3,其中R3为保护基,而波浪线表示相邻双键处在E或Z构型的键。