Pd-Catalyzed Sulfinylzincation of Activated Alkynes with 1-Alkynyl Sulfoxides as a Sulfinyl Source
作者:Naoyoshi Maezaki、Suguru Yagi、Ryoko Yoshigami、Jun Maeda、Tomoko Suzuki、Shizuka Ohsawa、Kouji Tsukamoto、Tetsuaki Tanaka
DOI:10.1021/jo034108j
日期:2003.7.1
with 1-alkynyl sulfoxide as a sulfinyl source was developed. Bis-sulfinyl alkenes were formed in good yields on treatment of 1-alkynyl sulfoxides with Et(2)Zn in the presence of a Pd-catalyst, wherein zinc sulfenate (or sulfinylzinc) species would be generated in situ to undergo highly syn-selective conjugate addition to the 1-alkynyl sulfoxides. By using 3,3-dimethyl-1-butynyl sulfoxides, formation of
开发了前所未有的Pd催化的亚砜基1-炔基亚砜催化的亚磺酰基锌化反应。在Pd催化剂存在下,用Et(2)Zn处理1-炔基亚砜时,高产率地形成了双亚磺酰基烯烃,其中,亚硫酸锌(或亚磺酰基锌)物质将在原位生成,以进行高度同位选择性共轭加成至1-炔基亚砜。通过使用3,3-二甲基-1-丁炔基亚砜,完全抑制了双亚磺酰基烯烃的形成,并且实现了活化炔烃的亚磺酰基锌化。该反应耐受各种功能,并且由于炔烃的δ位处杂原子的相邻基团的参与而大大促进了该反应。