Article ID Journal Published Year Pages File Type
5284907 Tetrahedron Letters 2006 4 Pages PDF
Abstract
The reaction of 2-(diphenylmethylene)thietan-3-one (2) with 1,2,4,5-tetrazines (3a-c) in KOH/MeOH/THF gives 4H-pyrazolo[5,1-c]thiazines (7a-c). This novel condensation reaction proceeds via the intermediacy of an 8-(diphenylmethylene)-2H-1,4,5-thiadiazocin-7(8H)-one (5), which undergoes a multi-step rearrangement including a rare anti-Michael addition.
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Physical Sciences and Engineering Chemistry Organic Chemistry
Preview
Transannular anti-Michael addition: formation of 4H-pyrazolo[5,1-c]thiazines
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