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Communication | Regular issue | Vol 24, No. 5, 1986, pp.1205-1208
Published online, 1st January, 1970
DOI: 10.3987/R-1986-05-1205
High-pressure Synthesis of 5,6-Dihydro-2H-pyran System. Eu(fod)3 Mediated (4+2)Cycloaddition of 1-Methoxybuta-1,3-diene to N-Protected α-Amino Aldehydes

Adam Golebiowski, Jan Izdebski, Ulla Jacobsson, and Janusz Jurczak*

*Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, P.O.Box 58, PL-01-224 Warszawa 42, Poland

Abstract

High-pressure [4+2]cycloaddition of 1-methoxybuta-1,3-diene (1) to N-protected α-amino aldehydes (2) is described. The use of a lanthanide catalyst permits reduction of the required pressure to 10 kbar.