his collaborators; but no precise connexion between the alkaloids has yet been disclosed, though many reactions and transformations suggest the close similarity of their molecular structure. On oxidation with chromic acid1, vomicine yields an acid, C17H22O5N2, 3H2O, which characteristically loses carbon dioxide at 130°, affording a base, C16H22O2N2. We have now found that the same acid can be obtained
Ring opening in di[1,2,3]triazolo-[1,3,6]thiadiazepine and -[3,1,5]benzothiadiazepine in reactions with butyllithium
作者:Natalya N. Volkova、Evgeniy V. Tarasov、Mikhail I. Kodess、Wim Dehaen、Vasiliy A. Bakulev
DOI:10.1070/mc2002v012n04abeh001625
日期:2002.1
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.
Boit, Chemische Berichte, 1949, vol. 82, p. 303,311
作者:Boit
DOI:——
日期:——
Leuchs; Boit, Chemische Berichte, 1940, vol. 73, p. 99,101
作者:Leuchs、Boit
DOI:——
日期:——
Leuchs; Boit, Chemische Berichte, 1940, vol. 73, p. 885,891