The /3-bromoether synthesis of olefins, as developed by Boord and his coworkers, (2, 6-8) gives many types of olefins almost entirely free of isomers, except the geometric forms; however, the synthesis is lengthy and hence the over-all yields are not very high. By the original procedure, a,ß-dibromoethers were obtained by brominating -chloroethers which were prepared by treating aldehydealcohol mixtures with hydrogen chloride; reaction of the dibromides with Grignard reagents then gave the desired /3-bromoethers. In the past few years simple

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