3aR*)-2-hydroxy-3a-phenyl-2-trifluoromethyl-3,3a,4,5-tetrahydropyrrolo[1,2-a]quinazolin-1(2H)-one(cis-18). The effects of the nature of the oxo compound and the temperature on the ratio of the linear and angular cyclization products, as well as the diastereoselectivity of the product formation, were studied, with an increase in temperature leading to improved selectivity. Some of the linear pyrroloquinazolines were