... Volume 22, Issue 29, 1981, Pages 2833-2836. ... some indication of this effect in the sulphenylations of 11 and 14 (R = Me), in that 14 gave only a low yield of y-product, although no a-product was identified.3 11 This reaction (22 - 23) was ... Tetrahedron Letters (1979), p. 3209. 3. ...