E. Troyansky et al., AN APPROACH TO 8-MEMBERED, 16-MEMBERED AND 24-MEMBERED SULFUR-CONTAINING HETEROCYCLES VIA HOMOLYTIC CYCLOADDITION OF ALKYNES WITH BUTANE-1,4-DITHIOL, Mendeleev communications, (1), 1995, pp. 18-20
Homolytic cycloaddition of butane-1,4-dithiol with alkynes offers a fa
cile one-pot route to 8-membered 1,4-dithiocanes and 16- and 24-member
ed crown thioethers, 1,4,9,12-tetrathiacyclohexadecanes and 1,4,9,12,1
7,20-hexathiacyclotetracosanes.