1,3-Dipolar cycloaddition ofin situ generated 2,2-dimethyl-and 2,2-dichlorodiazocyclopropanes to 3,3-dimethylcyclopropene
摘要:
2,2-Dimethyl- and 2,2-dichlorocyclopropyl-N-nitrosoureas were synthesized for the first time. Under the action of MeONa/MeOH at -10 degrees C, these compounds generate the corresponding 2,2-dimethyl- and 2,2-dichlorodiazocyclopropanes, which are readily trapped by 3,3-dimethylcyclopropene to give the products of 1,3-dipolar cycloaddition, viz., isomeric substituted spiro {2,3-diazabicyclo[3.1.0]hex-2-ene-4,1'-cyclopropanes}, in yields of about 70%.
Formation and reactions of substituted diazocyclopropanes and cyclopropyldiazonium ions
作者:I. P. Klimenko、Yu. V. Tomilov、O. M. Nefedov
DOI:10.1023/b:rucb.0000024855.62916.80
日期:2004.1
Decomposition of N-nitroso-N-cyclopropylureas at 5—7 °C on treatment with K2CO3 containing 15—20% H2O allows simultaneous generation of both substituted diazocyclopropanes and cyclopropyldiazonium ions, which can react according to 1,3-dipolar cycloaddition or azo-coupling pattern with appropriate substrates. The nature of substituents in the cyclopropyl ring have a pronounced influence on the product
1,3-Dipolar cycloaddition ofin situ generated 2,2-dimethyl-and 2,2-dichlorodiazocyclopropanes to 3,3-dimethylcyclopropene
作者:Yu. V. Tomilov、E. V. Shulishov、I. P. Klimenko、O. M. Nefedov
DOI:10.1007/bf01431115
日期:1996.11
2,2-Dimethyl- and 2,2-dichlorocyclopropyl-N-nitrosoureas were synthesized for the first time. Under the action of MeONa/MeOH at -10 degrees C, these compounds generate the corresponding 2,2-dimethyl- and 2,2-dichlorodiazocyclopropanes, which are readily trapped by 3,3-dimethylcyclopropene to give the products of 1,3-dipolar cycloaddition, viz., isomeric substituted spiro 2,3-diazabicyclo[3.1.0]hex-2-ene-4,1'-cyclopropanes}, in yields of about 70%.