New carbon carbon bond forming reactions of cyclic sulfate esters and cyclic sulfamidates
作者:Melanie K Pound、Darren L Davies、Melanie Pilkington、Maria M de Pina Vaz Sousa、John D Wallis
DOI:10.1016/s0040-4039(02)00138-7
日期:2002.3
Carbon–carbon bonding forming reactions of two cyclicsulfate esters and a cyclic sulfamidate are reported, the former with lithium dianions to give substituted tetrahydrofuran derivatives with displacement of sulfate, and the latter undergoes ring-opening monosubstitution reactions with stabilised organolithiums and an organocuprate species.
Facile Synthesis of β-Amino
Disulfides, Cystines, and Their Direct Incorporation into
Peptides
作者:Srinivasan Chandrasekaran、Nasir Baig R. B.、Catherine Kanimozhi、V. Sai Sudhir
DOI:10.1055/s-0028-1088133
日期:——
the synthesis of beta-amino disulfides by regioselectiveringopening of sulfamidates with benzyltriethylammonium tetrathiomolybdate [BnNEt3](2)MoS4. Stability and reactivity of different protecting groups under the reaction conditions have been discussed. This methodology has also been extended to serine and threonine derived sulfamidates to furnish cystine and 3,3'-dimethyl cystine derivatives.