aldehydes has been shown to furnish β-(phenylseleno)ketols in high yield. The reductive cyclization of these species in the presence of tri-n-butyltin hydride affords the corresponding condensed carbocycles with high efficiency.
已证明先用(苯基
硒代)丙
氨酸或
钛酸酯依次处理α,β-不饱和酮,再用代表性的β,γ-不饱和醛处理,可高产率地提供β-(苯基
硒代)酮醇。这些物质在氢化三正
丁基锡的存在下的还原环化反应可高效提供相应的缩合碳环。