L-b-threonine lactone

Lactonization spontaneously processed under weak base, and the elongation of backbone makes it easy. @Sep. 2003

Published: Akiko Asano and Mitsunobu Doi
4(R)-(N-Benzoylamino)-5(R)-methyltetrahydrofuran-2-one: an L-b-threonine analogue.
Acta Cryst. E59, o1486-o1487 (2003).
Copyright © International Union of Crystallography

X-Ray Data Summary
formula C12 H13 N O3
weight 219.23
space group P21
Cell Crystal
a (A) 8.521(1) description needle
b (A) 5.1143(6) colour Colorless
c (A) 12.401(2) size (mm) 0.5x0.06x0.03
a (deg) 90 Dx (g/ml) 1.364
b (deg) 99.098(2) F(000) 232
g (deg) 90 deg. m (mm^-1) 0.099
volume 533.6(1) wavelength (A) 0.71073
Z 2
Diffrn measurementRefinementspace
device type Bruker AXS SMART APEX    Flack x parameter -0.06(6)
Rint 0.0236 parameters 146
T (K) 120.0 restraints 1
theta max (deg) 27.86 R_factor_gt 0.0434
reflections obs. 4798 wR_factor_gt 0.1156
reflections for ref. 1339 .gt. 2s(I) Dr max (e/A^3) 0.404
Dr min (e/A^3) -0.155
Structure D/s max <0.001
solutionSHELXS-97 Goodness of fit 1.121
refinementSHELXL-97 fraction for q max  0.976

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