Cycloadditions of allylsilanes, part 13. Lewis acid-promoted stereospecific [2+2] cycloaddition of crotylsilanes and methyl propynoate
作者:Hans-Joachim Knölker、Elke Baum、Oliver Schmitt
DOI:10.1016/s0040-4039(98)01678-5
日期:1998.10
The titanium tetrachloride-promoted reaction of the (Z)- and (E)-crotylsilanes 6 and 9 with methyl propynoate (1) provides by stereospecific [2+2] cycloaddition the cis- and trans-3,4-disubstituted cyclobutenes 7 and 10. (C) 1998 Elsevier Science Ltd. All rights reserved.