A new method for the synthesis of spiro γ-butyrolactone via samarium(<scp>II</scp>) iodide-induced cyclization
作者:Kimiyuki Shibuya、Hiroto Nagaoka、Yasuji Yamada
DOI:10.1039/c39910001545
日期:——
Reactions of 1-(2-forrnyloxyethyl)-3-formyloxycycloalkenes 2 with samarium(II) iodide give hemiacetals 3 which are subsequently converted to spiro γ-butyrolactones 4.