N-bromosuccinimide in acetic acid and alkoxide ion-mediated α,α-dialkoxyhydroxylation. Under acidic condition, trimethyl orthoformate-mediated reaction of compound 7a yielded aminodienylester 8 in the presence of Ph3PCHCO2Et. The γ-acetate dehydropipecolinonitrile 4 was also synthesized via boron trifluoride etherate-promoted addition of compound 8 with trimethylsilyl cyanide and N-bromosuccinimide and selective
的4,4-二烷氧基-3- piperidinols合成7是由
哌啶-4-酮的α-
溴化进行5 与Ñ
溴代琥珀
酰亚胺在
乙酸和醇盐离子介导的α,α-dialkoxyhydroxylation。在酸性条件下, 在Ph 3 P CHCO 2 Et存在下,
原甲酸三甲酯介导的化合物7a反应生成
氨基二烯基酯8。所述γ-
醋酸dehydropipecolinonitrile 4还合成通过
三氟化硼醚促进的加成化合物的8与
氰化三甲基
硅烷和Ñ
溴代琥珀
酰亚胺和选择性加氢。