Jmm. Del Corral et al., An easy procedure for the preparation of 3-methylidenetetrahydrofurans from dimethyl succinates, SYNTHESIS-S, (1), 2000, pp. 154-164
A new synthetic procedure to obtain 3-methylidenetetrahydrofurans is descri
bed, in which the methylidene group is generated during the formation of th
e tetrahydrofuran ring. These are prepared by reduction of differently subs
tituted dimethyl succinates obtained by Stobbe condensation.