Regiocontrolled Synthesis of Enantiopure 3,3‘-Thiosubstituted Biphenyls
摘要:
Sulfenylation of 6,6'-dimethoxy-2,2'-dihydroxybiphenyl, used as a racemic mixture and single enantiomers, by phthalimidesulfenyl chloride afforded the corresponding 3,3'-N,N'-dithiophthalimide with complete regioselectivity. Simple manipulations of the latter compound allowed access to the corresponding bis-thiol or o-thioquinone as useful intermediates for the synthesis of new sulfur-containing open-chain and macrocyclic C-2 enantiopure ligands. The application of this methodology to the preparation of a biphenyl bearing two cysteine units as potential HIV-1 protease inhibitor is also described.
Regiocontrolled Synthesis of Enantiopure 3,3‘-Thiosubstituted Biphenyls
摘要:
Sulfenylation of 6,6'-dimethoxy-2,2'-dihydroxybiphenyl, used as a racemic mixture and single enantiomers, by phthalimidesulfenyl chloride afforded the corresponding 3,3'-N,N'-dithiophthalimide with complete regioselectivity. Simple manipulations of the latter compound allowed access to the corresponding bis-thiol or o-thioquinone as useful intermediates for the synthesis of new sulfur-containing open-chain and macrocyclic C-2 enantiopure ligands. The application of this methodology to the preparation of a biphenyl bearing two cysteine units as potential HIV-1 protease inhibitor is also described.
Phthalimidesulfenyl chloride part 13.1 3,3′-regioselective thiofunctionalization of atropisomeric 2,2′-biphenols
作者:Giuseppe Capozzi、Giovanna Delogu、Maria A. Dettori、Davide Fabbri、Stefano Menichetti、Cristina Nativi、Roberta Nuti
DOI:10.1016/s0040-4039(99)00762-5
日期:1999.6
Regioselective 3,3'-thiofunctionalization of atropisomeric biphenol 2 can be achieved using phthalimidesulfenyl chloride as the key reagent. The bis-thiophthalimide derivative 3 is the starting material for the preparation of linear (7a-d) and macrocyclic (15a-d) C-2 symmetric ligands containing the biphenyl moiety. (C) 1999 Elsevier Science Ltd. All rights reserved.
Desymmetrization of 2,2′,6,6′-tetramethoxybiphenyl by regioselective sulfenylation reaction
A practical regioselective sulfenylation reaction of the achiral title compound 1 provides desymmetrization and access to C-symmetric sulphur derivatives. Resolution of 2,2",6,6'-tetramethoxy-3,3'-dimercapto-1,1'-biphenyl 7 was achieved by conversion to the corresponding dithiocarbonate diastereomers. The absolute configuration of (aR)-(-)-7 and (aS)-(+)-7 was assigned unambiguously. (C) 2002 Elsevier Science Ltd. All rights reserved.
Regiocontrolled Synthesis of Enantiopure 3,3‘-Thiosubstituted Biphenyls
Sulfenylation of 6,6'-dimethoxy-2,2'-dihydroxybiphenyl, used as a racemic mixture and single enantiomers, by phthalimidesulfenyl chloride afforded the corresponding 3,3'-N,N'-dithiophthalimide with complete regioselectivity. Simple manipulations of the latter compound allowed access to the corresponding bis-thiol or o-thioquinone as useful intermediates for the synthesis of new sulfur-containing open-chain and macrocyclic C-2 enantiopure ligands. The application of this methodology to the preparation of a biphenyl bearing two cysteine units as potential HIV-1 protease inhibitor is also described.