Syntheses and crystal structures of (S)-methyl 2-(4-R-phenylsulfonamido)- 3(1H-indol-3-yl)propanoate (R=H (1) and Cl (2))

The title compounds (S)-methyl-2-(4-R-phenylsulfonamido)-3-(lH-indol-3yl) propanoate (R=H (1), Cl (2)) have been synthesized and their crystal structures also have been determined by X-ray single-crystal diffraction. Compound 1 (C18H18N2O4S) belongs to orthorhombic, space group P212121 with a=9.6348(14), b=11.1517(17), c=16.412(3) Å, V=1763.4(5) Å3, Mr=358.40, Z=4,Dc=1.350 g/cm3, μ=0.209 mm-1, F(000)=752, R=0.0348 and wR=0.0714. Compound 2 (C18H17ClN2O4S) crystallizes in orthorhombic, space group P212121with a=9.3128(14), b=10.9655(16), c=17.783(3) Å, V=1815.9(5) Å3, Mr=392.85, Z =4, D0=1.437 g/cm3, μ=0.352 mm-1, F(000)=816, R=0.0389 and wR=0.0845. The absolute structure Flack parameters X of compounds 1 and 2 are -0.03(8) and -0.06(7), respectively. X-ray analysis reveals that the crystal structures of these two compounds both involve two intermolecular N-H-O hydrogen bonds.