Palladium(II)-catalysed acetalization of terminal olefins bearing electron-withdrawing substituents with 1,3- and 1,2-diols
作者:Takahiro Hosokawa、Toshiyuki Ohta、Shun-Ichi Murahashi
DOI:10.1039/c39830000848
日期:——
Treatment of terminal olefins bearing electron-withdrawing groups with (R,R)-pentane-2,4-diol (2) in the presence of PdCl2–CuCl–O2 in 1,2-dimethoxyethane gives cyclic acetals such as (3) and (12b)via attack at the terminal carbon atom; the corresponding acetals are similarly formed from propane-1,3-diol (5) and ethylene glycol (8).
端烯烃轴承吸电子基团与(处理- [R ,- [R )-戊烷-2,4-二醇(2在的PdCl存在下)2 -CuCl-O 2在1,2-二甲氧基乙烷给出环状缩醛,例如(3)和(12b)通过对末端碳原子的攻击;相应的缩醛类似地由丙烷1,3-二醇(5)和乙二醇(8)形成。