Synthesis of 4-azacyclopent-2-enones and 5,5-dialkyl-4-azacyclopent-2-enones
摘要:
Three different methods are reported for the preparation of 4-azacyclo-2-enones 1, two of which allow the preparation of the compounds in optically active form. In addition, a facile route to 4-aza-5,5-dimethyleyclopent-2-enones 2 is disclosed. (C) 2004 Elsevier Ltd. All rights reserved.
1,2,3-triazolo[4,5-d]pyrimidines as P2T receptor antagonists
申请人:AstraZeneca UK Limited
公开号:US06251910B1
公开(公告)日:2001-06-26
Compounds of formula having the following stereochemistry
wherein R, R1, R2, R3 and R4 are as defined in the specification. The compounds are useful as P2T receptor antagonists.
Stereoselective synthesis of carbocyclic analogues of the nucleoside Q precursor (PreQ<sub>0</sub>)
作者:Sabin Llona-Minguez、Simon P Mackay
DOI:10.3762/bjoc.10.135
日期:——
A convergent and stereoselective synthesis of chiral cyclopentyl- and cyclohexylamine derivatives of nucleoside Q precursor (PreQ0) has been accomplished. This synthetic route allows for an efficient preparation of 4-substituted analogues with interesting three-dimensional character, including chiral cyclopentane-1,2-diol and -1,2,3-triol derivatives. This unusual substitution pattern provides a useful
Triazolo[4,5-d]pyrimidine compounds, their use as medicaments, compositions containing them and processes for their preparation. The compounds of the invention have the formula (I) as follows:
wherein R, X and R1 through R3 are as defined in the specification.
Triazolo [4,5-d]pyrimidine compounds, their use as medicaments,
申请人:AstraZeneca UK Limited
公开号:US06156756A1
公开(公告)日:2000-12-05
The invention provides new triazolo[4,5-d]pyrimidine compounds, their use as medicaments, compositions containing them and processes for their preparation.
Crystalline and amorphous form of a triazolo(4,5-d)pyrimidine compound
申请人:——
公开号:US20030181469A1
公开(公告)日:2003-09-25
The invention provides new forms of a chemical compound of formula (I). The invention relates to forms fo a chemical compound (I), in particular to crystalline and amorphous forms, more particularly four crystalline forms and an amorphous form. The invention further relates to processes for the preparation of such forms, to pharmaceutical compositions comprising the compound in crystalline and/or amorphous form and to therapeutic use of such forms.
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