Cycloaddition Reactions of N-(2-Chlorethylidene)cyclohexylamine N-oxide with Enol Acetates
Cycloaddition reactions of the reactive intermediates obtained from N-(2-chloroethylidene)-cyclohexylamine N-oxide (2) in the presence of AgBF4 in 1,2-dichloroethane at 0 deg C with the enol acetates 6a-f are highly regioselective and stereoselective and yield the compounds 9a-d.The not isolated iminium salts 7a-f and 8e-f react with KCN in water in high stereoselectivity to give the 1,2-oxazine derivates 9a-f and 10e-f.
Shatzmiller, Shimon
p. 1933 - 1939
(2007/10/02)
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