对苯二异氰酸酯 、
[1'(R)-α-methylbenzyl]aziridine-2(R)-carboxylate (-)-menthol ester 在
magnesium bromide 作用下,
以
1,4-二氧六环 为溶剂,
以76%的产率得到bis((1R,2S,5R)-2-isopropyl-5-methylcyclohexyl) 3,3'-(1,4-phenylene)(4R,4'R)-bis(2-oxo-1-((R)-1-phenylethyl)imidazolidine-4-carboxylate)