Di[1,2,3]triazolo[1,5-a:5',1'-d][3,1,5]benzothiadiazepine treated with butyllithium undergoes ring opening via the thiophilic addition of butyllithium at the C–S bond, whereas 9,10-dihydrodi[1,2,3]triazolo[1,5-b:5',1'-f][1,3,6]thiadiazepine mainly undergoes lithiation of the methylene group followed by C–N bond cleavage to give 1-vinyltriazolyl sulfide.
Ring opening in di[1,2,3]triazolo-[1,3,6]thiadiazepine and -[3,1,5]benzothiadiazepine in reactions with butyllithium
N. N. Volkova, E. V. Tarasov, M. I. Kodess, W. Dehaen and V. A. Bakulev, Mendeleev Commun., 2002, 12, 131 DOI: 10.1070/MC2002v012n04ABEH001625
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