Wrackmeyer, Bernd; Kehr, Gerald; Willbold, Sabine; Boese, Roland:
Novel rearrangements and formation of 2,5-dihydro-1,2,5-oxoniastannaboratoles via methanolysis of zwitterionic h2-(alkyn-1-yl-borate)alkenyltin compounds.
2000
In: Chemistry of Heterocyclic Compounds (New York)(Translation of Khimiya Geterotsiklicheskikh Soedinenii), Jg. 35 (2000), Heft 9, S. 1041 - 1051
Artikel/Aufsatz in Zeitschrift2000Chemie
Titel:
Novel rearrangements and formation of 2,5-dihydro-1,2,5-oxoniastannaboratoles via methanolysis of zwitterionic h2-(alkyn-1-yl-borate)alkenyltin compounds.
Autor(in):
Wrackmeyer, Bernd; Kehr, Gerald; Willbold, Sabine; Boese, RolandLSF
Erscheinungsjahr
2000
Erschienen in:
Titel:
Chemistry of Heterocyclic Compounds (New York)(Translation of Khimiya Geterotsiklicheskikh Soedinenii)
in:
Jg. 35 (2000), Heft 9, S. 1041 - 1051
ISSN:

Abstract:

Organo-substituted 2,5-dihydro-1,2,5-oxoniastannaboratoles I (R = Et, R1 = nPr, CH2NMe2; R = iPr, R1 = Et) were prepd. by methanolysis of zwitterionic h2-(alkyn-1-ylborate)alkenyltin compds. Analogously, the bis[h2-(alkyn-1-yl-borate)alkenyltin] deriv. reacts with an excess of methanol to give a dimeric MeO-bridged 2,5-dihydro-1,2,5-oxoniastannaboratole II. Various intermediates could be identified by NMR spectroscopy, and the mol. structure of II was detd. by x-ray anal. The structures of several products of the methanolysis indicate that protolysis of an Sn-C: bond occurs first, followed by an MeO/alkenyl exchange reaction.