Crystal structure of 5-(l-menthyloxy)-3-bromo-4-(R)-(+)-methylbenzylamino-2(5H)-furanone

The crystal structure of the title compound 1, C22H30BrNO3 , was determined by X-ray analysis at 296(1)K. The crystal belongs to othorhombic system, s pace group P2(1)2(1)2(1) With a = 9. 842(5) , b = 12. 510(5) , c = 17. 763( 6) Angstrom, V = 2187 (3) Angstrom(3) , Z = 4, M-r = 436. 37, D-x = 1. 33 g /cm(3), mu = 18. 79 cm(-1) , F(000) = 912 and the final R = 0. 047 and R-w = 0. 053 for 1429 observed reflections with I greater than or equal to 3 si gma(I). Structure analysis reveals that the absolute configuration at C-14 of the acetal carbon of the title compound is S.