In this article we mainly discuss the effect of anion of Lewis acid on the structure of the intermediate in synthesis of valsartan analogue. The crystal belongs to monoclinic system with space group P21/c, and a=1.099 9(3)nm, b=1.913 4(5) nm, c=0.977 8(3) nm,β=104.806(4)°, V=1.989 5(9) nm3, Dc=1.708 g·cm-3, Z=18.
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