1,3-dimethyl-5-(2-(2-methylbutyl)benzylidene)pyrimidine-2,4,6(1H,3H,5H)-trione 在
scandium tris(trifluoromethanesulfonate) 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 24.0h,
以97%的产率得到3-ethyl-1',3,3'-trimethyl-3,4-dihydro-1H,1'H-spiro[naphthalene-2,5'-pyrimidine]-2',4',6'(3'H)-trione