A rapid and efficient synthesis of imidazo [1,2-a] and 1,2,4-triazolo [4,3-a]-piperazine car☐ylic acids.
作者:Gary A. McCort、Jean Claude Pascal
DOI:10.1016/s0040-4039(00)60105-3
日期:1992.7
A simple and general synthesis of novel cyclic α-amino acids by a route employing an easily accessable protected piperazine car☐ylic acid imino-ether is described.
描述了一种新的环状α-氨基酸的简单通用合成方法,该路线采用易于获得的受保护的哌嗪汽车☐酸亚氨基醚。
Hiv Integrase Inhibitors
申请人:Wai S. John
公开号:US20080015187A1
公开(公告)日:2008-01-17
Bicyclic pyrazoles of Formula I are inhibitors of HIV integrase and inhibitors of HIV replication:
wherein Z is O or N(R
8
); n is an integer equal to zero or 1; and R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
and R
8
are defined herein. The compounds are useful in the prevention and treatment of infection by HIV and in the prevention, delay in the onset, and treatment of AIDS. The compounds are employed against HIV infection and AIDS as compounds per se or in the form of pharmaceutically acceptable salts. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines.
Bicyclic pyrazoles of Formula I are inhibitors of HIV integrase and inhibitors of HIV replication:
wherein Z is O or N(R8); n is an integer equal to zero or 1; and R1, R2, R3, R4, R5, R6, R7 and R8 are defined herein. The compounds are useful in the prevention and treatment of infection by HIV and in the prevention, delay in the onset, and treatment of AIDS. The compounds are employed against HIV infection and AIDS as compounds per se or in the form of pharmaceutically acceptable salts. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines.
[EN] HIV INTEGRASE INHIBITORS<br/>[FR] INHIBITEURS INTÉGRASE VIH
申请人:MERCK & CO INC
公开号:WO2005120516A3
公开(公告)日:2007-02-22
Synthesis of 4,6-Unsubstituted 2-Aminodihydropyrimidine-5-carboxylates through Sequential Staudinger/Aza-Wittig/Cyclization Reactions
作者:Yoshio Nishimura、Hidetsura Cho
DOI:10.1055/s-0034-1378932
日期:——
A novel method for constructing the dihydropyrimidine skeleton is developed. The method involves three sequential reactions: (1) the Staudinger reaction of (E)-ethyl 3-azido-2-[(tert-butoxycarbonyl) amino] methyl} acrylate with triphenylphosphine; (2) aza-Wittig reaction of the resulting iminophosphorane with isocyanate; (3) intramolecular cyclization of the carbodiimide intermediate to give 4,6-unsubstituted 2-aminodihydropyrimidine-5-carboxylates in high overall yield. The method can be applied to various aromatic isocyanates, with substrates having electron-withdrawing groups showing high reactivities. In the case of aliphatic benzyl isocyanate, the reaction provides bicyclic dihydropyrimidine as the major product. The N-protecting group (Boc) can easily be removed to obtain N-unsubstituted dihydropyrimidines. All dihydropyrimidines in this study were previously unavailable and are difficult to synthesize by conventional methods.