Lithiated chloromethyl derivatives 2a-d, available by deprotonation of 2-(chloromethyl)-1,3-benzothiazole 1a -1,3-oxazoIine 1b, -pyridine 1c and -quinoline 1d, react with carbonyl compounds to give chlorohydrins 3a-g and then epoxides 4a-g upon treatment with NaOH/(PrOH)-Pr-i. The same chlorohydrins 3a-g could be converted into heterosubstituted chloroalkenes 5a-g with very high E stereoselection upon reaction with MeSO2Cl/Et3N. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Lithiated chloromethyl derivatives 2a-d, available by deprotonation of 2-(chloromethyl)-1,3-benzothiazole 1a -1,3-oxazoIine 1b, -pyridine 1c and -quinoline 1d, react with carbonyl compounds to give chlorohydrins 3a-g and then epoxides 4a-g upon treatment with NaOH/(PrOH)-Pr-i. The same chlorohydrins 3a-g could be converted into heterosubstituted chloroalkenes 5a-g with very high E stereoselection upon reaction with MeSO2Cl/Et3N. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Lithiated chloromethyl derivatives 2a-d, available by deprotonation of 2-(chloromethyl)-1,3-benzothiazole 1a -1,3-oxazoIine 1b, -pyridine 1c and -quinoline 1d, react with carbonyl compounds to give chlorohydrins 3a-g and then epoxides 4a-g upon treatment with NaOH/(PrOH)-Pr-i. The same chlorohydrins 3a-g could be converted into heterosubstituted chloroalkenes 5a-g with very high E stereoselection upon reaction with MeSO2Cl/Et3N. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.