Ferf-butyltetrazolyl

It could be added that reaction of BT sulfones with a,)6-unsaturated aldehydes provided dienes in high yields. Pyridyl- and ferf-butyltetrazolyl-sulfones afford olefins in moderate yields but with noticeable preference of Z-isomers. 

Aissa reported [109] that a combination of ferf-butyltetrazolyl as the migrating ring and cesium carbonate as the base in THF-DMF, at reflux fem-perafure, enables cyclizafion reacfions. As indicafed in Scheme 117, a six-membered ring was formed in an excellent yield. Cyclization of 347 pro-... 

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See also in sourсe #XX -- [ ]

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