References
- Wichterle , O. , Prochazka , J. and Hofmann , J. 1948 . Coll. Czech. Chem. Commun. , 13 : 300
- Hatch , L. F. and Perry , R. H. Jr. 1955 . J. Am. Chem. Soc. , 77 : 1136
- Chalchat , J.-C. , Theron , F. and Vessière , R. 1972 . Ann. Chim. (Paris) , 7 : 269 Our stereochemical assignment follows that of. It is also consistent with the observation in ref. 2. that the E isomer is the lower boiling of the two
- The crude mixture of chlorides may be purified by short-path (Kugelrohr) distillation before treatment with triethylamine, but an insignificant improvement in yield (to 43%) is thereby realized
- The E, and Z, chloro esters may presumably be separated by careful fractionation (viz. ref. 2), but for the present purposes this was unnecessary
- The crude reaction mixture contains a substantial amount of finely divided insoluble material, and emulsions are likely to form during the extractive workup. The layers separate satisfactorily upon standing