Page 1. Tetrahedron Letters,Vo1.26,No.24,pp ... The products (10) were remarkably resistant to the (1,3lPhS shift.3'7 Four weeks in sunlight gave only 24% of (lib) from (lob), but reasonable yields (57% of lid and 53% of lie, both as 1:lmixtures of E:Z isomers) were obtained -- ...