Practical Synthesis of 1H-Indazole-3-carboxylic Acid and Its Derivatives
摘要:
A practical and convenient synthesis of 1H-indazole-3-carboxylic acid and its amide and ester derivatives from the corresponding derivatives of 2-nitrophenylacetic acid was described.
Practical Synthesis of 1H-Indazole-3-carboxylic Acid and Its Derivatives
摘要:
A practical and convenient synthesis of 1H-indazole-3-carboxylic acid and its amide and ester derivatives from the corresponding derivatives of 2-nitrophenylacetic acid was described.
Synthesis of Indazoles by the [3+2] Cycloaddition of Diazo Compounds with Arynes and Subsequent Acyl Migration
作者:Zhijian Liu、Feng Shi、Pablo D. G. Martinez、Cristiano Raminelli、Richard C. Larock
DOI:10.1021/jo702062n
日期:2008.1.1
The [3+2] cycloaddition of a variety of diazocompounds with o-(trimethylsilyl)aryl triflates in the presence of CsF or TBAF at room temperature provides a very direct, efficient approach to a wide range of potentially biologically and pharmaceutically interesting substituted indazoles in good to excellent yields under mild reaction conditions. Simple diazomethane derivatives afford N-unsubstituted
Electrophilic amination reactions with
<scp>1</scp>
<i>H</i>
<scp>‐indazole</scp>
‐3‐carboxylates: Synthesis of amino acid frameworks and
<scp>3‐amino</scp>
‐2‐oxindoles
作者:Isao Mizota、Mayuko Mori、Makoto Shimizu
DOI:10.1002/jhet.4015
日期:2020.7
Reaction of 1‐ sulfonylindazole‐3‐carboxylates with various Grignard reagents effects the N ‐N bond cleavage of the hydrazone moiety with the first nucleophile and the subsequent N ‐alkylation gives N ,N ‐dialkylation products in good yields. A new strategy for the synthesis of α‐(2‐arylsulfonamide)phenylglycine, a precursor to tissue factor/factor VIIa inhibitors is also described. Moreover, the synthesis