Processes are provided which create an aldehyde methylene, or hydrated or hemiacetal methylene attached to a heteroatom of a 6 membered ring without going through an olefinic group and without the necessity of using an osmium reagent. In particular, a comopound of formula (I) can be produced from (II) and avoid the use of an allyl amine:
where R, P1, P3, R3 and Rx are as described herein.
本发明提供了无需通过烯烃基团,也无需使用
锇试剂,即可生成醛亚甲基,或连接到 6 个成员环的杂原子上的
水合亚甲基或
半缩醛亚甲基的工艺。特别是可以由(II)制得式(I)的化合物,而无需使用
烯丙基胺:
其中 R、P1、P3、R3 和 Rx 如本文所述。