Syntheses of isotopically labelled angiotensin II receptor antagonist GR138950X
摘要:
Syntheses of [C-13] and [C-14]-labelled versions of angiotensin II receptor antagonist GR138950X, labelled in the imidazole carboxamide residue, are described. These involved preparation of an iodoimidazole substrate by a novel iododecarboxylation procedure, followed by cyanation with a mixture of carbon-labelled potassium cyanide and copper (I) iodide in DMF at high temperature. The preparation of a mass-labelled (M+5) version of GR138950X is also described. This involved the synthesis of an [C-13(3), N-15(2)]-labelled imidazole from a 1,2,3-tricarbonyl compound, C-13(3)]propionaldehyde and [N-15]ammonia. The labelled imidazole was further elaborated into multiply-labelled GR138950X.
Nucleophilic 1,2-Shifts of Alkoxycarbonyl and Carboxylate Groups in the Benzilic-Acid Type Rearrangement of ?,?-Dioxobutyric Esters
作者:Heike Gowal、L� H. Dao、Hans Dahn
DOI:10.1002/hlca.19850680121
日期:1985.2.13
high pH, the benzilic-acidrearrangement with exclusive 1,2-shift of the COO(t-Bu) group; the same is true for the corresponding isopropyl ester 1c and ethyl ester 1b at high pH, whereas at lower pH, the overall picture of these reactions is complicated by concurrent hydrolysis of the ester, followed by a 1,2-shift of the COO− group. Consequently, the shift of these electron-attracting groups cannot be
[EN] SULPHUR-LINKED IMIDAZOLE COMPOUNDS FOR THE TREAMENT OF HIV<br/>[FR] COMPOSES D'IMIDAZOLE A LIAISON SOUPHRE POUR LE TRAITEMENT DU VIH
申请人:PFIZER LTD
公开号:WO2005100322A1
公开(公告)日:2005-10-27
This invention relates to isophthalonitrile derivatives of formula (I) or pharmaceutically acceptable salts, solvates or derivative thereof, wherein R1 to R3 are defined in the description, and to processes for the preparation thereof, intermediates used in their preparation of, compositions containing them and the uses of such derivatives.The compounds of the present invention bind to the enzyme reverse transcriptase and are modulators, especially inhibitors thereof.
Trifluoroacetic Acid Catalyzed Cascade Reactions of 2,3‐Diketoesters with Cyclohexane‐1,3‐diones: Strategy Towards 4‐Hydroxybenzofuran Derivatives
作者:Qiang Sha、Haixuan Liu、Yuan Li
DOI:10.1002/adsc.201900056
日期:2019.4
An efficient trifluoroaceticacidcatalyzed cascade reaction of 2,3‐diketoesters with cyclohexane‐1,3‐diones is described for the synthesis of a series of 4‐hydroxybenzofurans. This simple protocol has the advantages of easy operation, readily available starting materials, good functional group tolerance, and easily scale‐up. Subsequent derivatization of the 4‐hydroxybenzofurans provides a reasonable
Alkoxycarbonyl- and Carboxylate-Group Migrations in the Benzilic Acid Rearrangement of Ethyl Cyclopropane-2, 3-dioxopropionate
作者:Hans Dahn、L� H. Dao、Rannoo Hunma
DOI:10.1002/hlca.19820650813
日期:1982.12.15
medium C3H5COC (OH)2COOEt (1b) is transformed into C3H5C (OH)(COOH)2 (2a). Labelling experiments show that the cyclopropyl group is not shifted, but only ROOC and/or −O2C groups. GC./MS. and NMR. analysis after incomplete reaction show that both ROOC- and −O2C-groups Migrate; at higher pH (ca. 14) the ester group rearrangement seems to be more important than at pH ca.9-10.
在碱性介质中,将C 3 H 5 COC(OH)2 COOEt(1b)转化为C 3 H 5 C(OH)(COOH)2(2a)。标记实验表明,环丙基不移动,而仅ROOC和/或- ö 2 C两组。GC./MS。和NMR。后反应不完全显示分析,这两个ROOC-和- ö 2 C-组迁移; 在较高的pH值(约14)下,酯基的重排似乎比在pH值约4时更为重要。9-10。
Sulphur-Linked Imidazone Compounds for the Treatment of Hiv/Aids
申请人:Jones Lyn Howard
公开号:US20080132549A1
公开(公告)日:2008-06-05
This invention relates to isophthalonitrile derivatives of formula (I)
or pharmaceutically acceptable salts, solvates or derivative thereof, wherein R
1
to R
3
are defined in the description, and to processes for the preparation thereof, intermediates used in their preparation of, compositions containing them and the uses of such derivatives.
The compounds of the present invention bind to the enzyme reverse transcriptase and are modulators, especially inhibitors thereof.