Synthesis and transformations of substituted 4,6-dimethylpyrazolo[3,4-b]pyridyl-3-azides and -sulfonyl chlorides
摘要:
Diazotization of the amino group of 3-amino-4,6-dimethylpyrazolo[3,4-b]pyrimidines and subsequent replacement of the diazo group in the formed diazonium chlorides by an azide group gave the corresponding 3-azido derivatives. Their reactions with active methylene compounds have been studied. Substitution of the diazo group by a sulfo group gave the related 4,6-dimethylpyrazolo-[3,4-b]pyridyl-3-sulfonyl chlorides and sulfonylamides.
LYNCH, BRIAN MAURICE;KHAN, MISBAHUL AIN;TEO, HUK CHIA;PEDROTTI, FRANCISCO, CAN. J. CHEM., 66,(1988) N 3, C. 420-428
作者:LYNCH, BRIAN MAURICE、KHAN, MISBAHUL AIN、TEO, HUK CHIA、PEDROTTI, FRANCISCO
DOI:——
日期:——
Pyrazolo[3,4-<i>b</i>]pyridines: Syntheses, reactions, and nuclear magnetic resonance spectra
作者:Brian Maurice Lynch、Misbahul Ain Khan、Huk Chia Teo、Francisco Pedrotti
DOI:10.1139/v88-074
日期:1988.3.1
2-Chloro-3-formylpyridine (2-chloronicotinaldehyde) was obtained by reduction of 2-chloro-3-cyanopyridine by Raney nickel and formic acid (3 1); this intermediate is inaccessible by the above N-oxidation route (peroxyacid oxidation of 3-formylpyridine yields pyridine-N-oxide 3-carboxylic acid). In the synthesis of the parent 1 from 2-chloro-3-formylpyridine, the yield was prejudiced by the formation
Synthesis and transformations of substituted 4,6-dimethylpyrazolo[3,4-b]pyridyl-3-azides and -sulfonyl chlorides
作者:I. G. Dmitrieva、L. V. Dyadyuchenko、V. D. Strelkov、E. A. Kaigorodova
DOI:10.1007/s10593-009-0169-y
日期:2008.10
Diazotization of the amino group of 3-amino-4,6-dimethylpyrazolo[3,4-b]pyrimidines and subsequent replacement of the diazo group in the formed diazonium chlorides by an azide group gave the corresponding 3-azido derivatives. Their reactions with active methylene compounds have been studied. Substitution of the diazo group by a sulfo group gave the related 4,6-dimethylpyrazolo-[3,4-b]pyridyl-3-sulfonyl chlorides and sulfonylamides.