Novel reactions of phosphorus(III) azides and isocyanates: unusual modes of cycloaddition with dipolarophiles and an unexpected case of ring expansion |
| |
| Authors: | Kumaraswamy Sudha Kommana Praveen Kumar N Satish Swamy K C Kumara |
| |
| Institution: | School of Chemistry, University of Hyderabad, Hyderabad-500046, A. P., India. |
| |
| Abstract: | New modes of 1,3-dipolar cycloaddition are uncovered by the isolation of CH2(6-t-Bu-4-Me-C6H2O)2]P(C(CO2Me)C(CO2Me)NNP(N3)(OC6H2-6-t-Bu-4-Me)2CH2]N) (3) and CH2(6-t-Bu-4-Me-C6H2O)2]P(C(CO2Me)C(CO2Me)C(O)N) (4) on treating CH2(6-t-Bu-4-Me-C6H2O)2]P-X X = N3 (1) and NCO (2)] with the dipolarophile MeO2CC identical to CCO2Me; compound 4 undergoes an unprecedented ring expansion upon addition of 2-(methylamino)ethanol to afford the spirocycle CH2(6-t-Bu-4-Me-C6H2O)2]P(OCH2CH2N(Me)CH(CO2Me)CH(CO2Me)C(O)N) (5). |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
