Some dehydropeptide analogues were directly synthesized by the reaction of unsaturated oxazolones with free amino acids.
Some dehydropeptide analogues were dir
By 1,4-bridging of p-tert-butylcalix [6] arene with 2,6-bis (bromomethyl)-4-methyl- anisole, a new type of bis-calix [5] arene analogue was obtained in high yi