Va. Vasin et al., UNUSUAL HETEROCYCLIZATION IN THE TRANSFORMATION OF 6-HALOMETHYLSULFONYL-SUBSTITUTED BICYCLO[3.1.1]HEPTANE UNDER RAMBERG-BACKLUND REACTION CONDITIONS, Mendeleev communications (Print), (3), 1998, pp. 122-125
Boiling of 7-bromo(chloro)methylsulfonyl-endo-6-phenylbicyclo [3.l.1]h
eptane in water-dioxane solutions of NaOH results in anti-6-hydroxy-7-
methylene-syn-6-phenylbicyclo [3.1.1]heptane according to the Ramberg-
Backlund reaction; in addition, a product of unusual heterocyclisation
is formed, namely, 3-oxa-2-phenyl-5-thiatricyclo [4.4.0.0(2,7)]decane
S,S-dioxide.