SYNTHESIS OF 5-AMINO-4-CYANOPYRAZOLES VIA RING OPENING-RING CLOSURE OF 5-AZIDO-4-IMINOMETHYLPYRAZOLES - ISOLATION OF THE INTERMEDIATE

被引：9

作者：

DEHAEN, W

BECHER, J

机构：

[1] ODENSE UNIV,DEPT CHEM,DK-5230 ODENSE,DENMARK

[2] UNIV LOUVAIN,DEPT CHEM,B-3001 HEVERLEE,BELGIUM

来源：

TETRAHEDRON LETTERS | 1991年 / 32卷 / 29期

关键词：

D O I：

10.1016/0040-4039(91)80835-T

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

5-Amino-4-cyanopyrazoles are prepared by thermolysis from 5-azido-4-iminomethylpyrazoles in fair yields. The reaction occurs via a ring opening-ring closure mechanism. The intermediate azocompound was isolated.

引用

页码：3565 / 3568

页数：4

共 5 条

[1] AN UNEXPECTED RING-OPENING RING-CLOSURE REACTION OF 5-AZIDO-4-FORMYLPYRAZOLE [J].

BECHER, J ;

BRONDUM, K ;

KRAKE, N ;

PLUTA, K ;

SIMONSEN, O ;

MOLINA, P ;

BEGTRUP, M .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1988, (08) :541-542

[2]

BECHER J, UNPUB

[3] FUSED PYRIMIDINES BY A TANDEM AZA-WITTIG ELECTROCYCLIC RING-CLOSURE STRATEGY - SYNTHESIS OF PYRAZOLO[3,4-D]PYRIMIDINE, [1,2,3]TRIAZOLO[4,5-D]PYRIMIDINE, AND THIAZOLO[4,5-D]PYRIMIDINE DERIVATIVES [J].

MOLINA, P ;

ARQUES, A ;

VINADER, MV ;

BECHER, J ;

BRONDUM, K .

JOURNAL OF ORGANIC CHEMISTRY, 1988, 53 (20) :4654-4663

[4]

Scriven E. F. V., 1984, AZIDES NITRENES

[5] ISOLATION OF PRIMARY DECOMPOSITION PRODUCTS OF AZIDES .2. AZIDOPYRAZOLES [J].

SMITH, PAS ;

BREEN, GJW ;

HAJEK, MK ;

AWANG, DVC .

JOURNAL OF ORGANIC CHEMISTRY, 1970, 35 (07) :2215-&

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