The use of heterogeneous catalysis in Diels-Alder reactions of N-acetyl-α,β-dehydroalaninates
作者:Carlos Cativiela、JoséI. García、JoséA. Mayoral、Elisabet Pires、Ana J. Royo、François Figueras
DOI:10.1016/0040-4020(94)01008-n
日期:1995.1
Several solids have been tested as heterogeneous catalysts in the Diels-Alderreactions of the relatively unreactive dienophiles methyl (1a) and (−)-menthyl (1b) α,β-dehydroalaninates with cyclopentadiene, which is the keystep in the asymmetric synthesis of cycloaliphatic α-amino acids. Reactions were carried out in toluene and in the absence of a solvent, the latter method leading to higher percentages