Productive Syntheses of 1-Ethynylcyclopropylamine and 1-Ethynylcyclobutylamine¹
作者:Armin de Meijere、Sergei Kozhushkov、Karsten Wagner-Gillen、Alexander Khlebnikov
DOI:10.1055/s-0030-1258964
日期:2010.12
The new 1,1-dimethylpropargylamine surrogates, 1-ethynylcyclopropylamine (3) and 1-ethynylcyclobutylamine (5), were prepared as hydrochlorides from cyclopropylacetylene and 6-chlorohex-1-yne in overall yields of 39 and 25%, respectively, on a scale of up to 300 mmol. The amine 3 was converted into the new ethynyl-extended 1-aminocyclopropanecarboxylic acid 4, and both the amine 3 as well as the amino acid 4 were made available as their N-Fmoc-protected derivatives.