Synthesis of 2-functionalized allyl tris(trimethylsilyl)silanes
作者:Chryssostomos Chatgilialoglu、Marco Ballestri、Donatella Vecchi、Dennis P. Curran
DOI:10.1016/0040-4039(96)01353-6
日期:1996.8
Reactions of unsubstituted and 2-substituted allyl phenyl sulfides with tris(trimethylsilyl)silane provide the corresponding allyl tris(trimethylsilyl)silanes rapidly and in high yields while the related reactions with allyl phenyl sulfones occur more slowly and in moderate yields.
Thiomaleic Anhydride: A Convenient Building Block for the Synthesis of α-Substituted γ- and δ-Lactones through Free-Radical Addition, Nucleophilic Ring Opening, and Subsequent Thiocarboxylate Manipulation
作者:David Crich、Md. Yeajur Rahaman
DOI:10.1021/jo901219k
日期:2009.9.4
carbonates and carbamates undergo clean free-radical addition to thiomaleic anhydride to give substituted thiosuccinic anhydrides in high yield on treatment with tris(trimethylsilyl)silane and a radical initiator. After removal of the tert-butyloxycarbonyl group, cyclization then affords lactones or lactams substituted in the α-position by a thiocarboxylic acid residue. This group is converted to amides through
A new synthesis of methylenomycinB (3) has been accomplished in four steps starting with the reaction of methyl (E)-3-lithio-2-methyl-3-phenylthioprop-2-enoate (2) with ethyl 2-(phenylthiomethyl)prop-2-enoate (4).
C-Allylation of 1- and 6-Bromosugars with Allylic Sulfides and Sulfones
作者:Fritiof Pontén、Göran Magnusson
DOI:10.1021/jo960749l
日期:1996.1.1
Reaction of the bromosugars 2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl bromide (1), methyl 2,3-anhydro-6-bromo-6-deoxy-alpha-D-allopyranoside (2), and methyl 2,3-anhydro-4-O-benzoyl-6-bromo-6-deoxy-alpha-D-allopyranoside (3) with the-allylic sulfides and sulfones 4-9 in the presence of hexabutyldistannane under photolytic conditions gave the corresponding alpha-C-allyl galactosides 10-12 and the 6-C-allylated epoxysugars 13, 15, and 16 in 61-90% yield.
BARTON, DEREK H. R.;GERO, STEPHANE D.;QUICLET-SIRE, BEATRICE;SAMADI, MOHA+, J. CHEM. SOC. PERKIN TRANS. 1,(1991) N, C. 981-985
作者:BARTON, DEREK H. R.、GERO, STEPHANE D.、QUICLET-SIRE, BEATRICE、SAMADI, MOHA+