Base treatment of hydrazonoyl chloride 2 with MeOPEG-supported acrylates 1 and acrylamides 5 gave the corresponding MeOPEG-supported 4,5-dihydropyrazoles 3 and 6. Basic hydrolysis of the cycloadducts caused the removal of the MeOPEG pendant giving 5-carboxy- or 5-aminocarbonyl- 4,5-dihydropyrazoles 7 and 8, respectively. Cycloaddition between 2 and enantiopure MeOPEG-supported acrylamide 10 gave a mixture of MeOPEG-supported cycloadducts 11 and 12 with low diastereoselectivity.
Nitrilimine cycloadditions to MeOPEG-bounded alkenyl dipolarophiles / L. Garanti, G. Molteni, P. Casati. - In: JOURNAL OF THE CHEMICAL SOCIETY. PERKIN TRANSACTIONS. 1. - ISSN 1472-7781. - 2:22(2002), pp. 2504-2508.
Titolo: | Nitrilimine cycloadditions to MeOPEG-bounded alkenyl dipolarophiles |
Autori: | |
Parole Chiave: | Organic-synthesis; ciclooxygenase; supports |
Settore Scientifico Disciplinare: | Settore CHIM/06 - Chimica Organica |
Data di pubblicazione: | 2002 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1039/b206629g |
Appare nelle tipologie: | 01 - Articolo su periodico |
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