
TY  - JOUR
A1  - Lynch, MJ 
A1  - Simpson, J 
A1  - Weavers, RT 
T1  - Diiodo Acetals and Unsaturated Lactones From Dihydropyran
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1993
VL  - 46
IS  - 2
SP  - 203
EP  - 212
KW  - 
UR  - https://doi.org/10.1071/CH9930203 
N2  - Reaction of dihydropyran with propiolic acid and N- iodosuccinimide gave an iodo ester which was cyclized under free-radical conditions to form an (E) iodomethylene lactone. Photolysis of this lactone could be controlled to generate mixtures of (E) and (Z) iodomethylene lactones, or alternatively the iodine-free methylene lactone. The structures of some by-products of the iodo ester formation have been shown to be a succinimide derivative and two stereoisomers of a diiodo acetal. X-Ray determination of the structure of one of the diiodo  acetal isomers is described. 
ER  -

