Pd(O) Promoted Transformation of 1,1‐Dialkoxycarbonyl‐2‐(1,3‐butadienyl)cyclopropanes into 2‐Ethenyl‐3‐cyclopentenes
Authors:
- 1 January 1984
- journal article
- research article
- Published by Wiley in Israel Journal of Chemistry
- Vol. 24 (2) , 149-152
Abstract
1,3‐Butadienylcyclopropanes activated by two electron‐withdrawing groups (1) smoothly rearrange to vinylcyclopentene derivatives in the presence of a Pd(O) catalyst under mild conditions. For example, dimethyl 1,3‐butadienylcyclopropane‐1,1‐dicarboxylate 1a reacts with 3 mol% Pd(PPh3)4 in DMSO at 25–60 °C for 30 min to provide dimethyl 2‐ethenyl‐3‐cyclopentene‐1,1‐dicarboxylate 2a in 87% yield. Other data show that the new method is useful in the synthesis of cyclopentene derivatives including dolichodial and iridodiol.Keywords
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