starting from triphenylphosphine, dialkyl acetylenedicarboxylates, alcohols (propargyl alcohol, 2,2,2‐trichloroethanol, and methanol), and ninhydrin. The stereochemistry of dimethyl 8‐oxo‐8a‐(2,2,2‐trichloroethoxy)‐8,8a‐dihydro‐2H‐indeno[2,1‐b]furan‐2,3‐dicarboxylate was established by single‐crystal X‐ray structure determination. The reaction is completely stereoselective.
SYNTHESIS OF HIGHLY ELECTRON-POOR ALKENES FROM IN SITU GENERATED STABILIZED PHOSPHORUS YLIDES AND NINHYDRIN VIA INTERMOLECULAR WITTIG REACTION
作者:Ali Ramazani、Ali Bodaghi
DOI:10.1080/10426500490466166
日期:2004.8
produced in the reaction between triphenylphosphine and dialkyl acetylenedicarboxylates, by alcohols leads to vinyltriphenylphosphonium salts, which undergo Michael addition reaction with conjugate base to produce the corresponding stabilizedphosphorusylides. Intermolecular Wittig reaction of the stabilizedphosphorusylides with ninhydrin leads to the corresponding, highly electron-poor alkenes.