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首页> 外文期刊>Journal of chemical crystallography >Crystal structures of (-)-(S (S), 1R, 2S, 5R)-menthyl p-tolyl sulfinate and (+)-(S (S) )-[(p-tolyl)sulfinyl]ferrocene
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Crystal structures of (-)-(S (S), 1R, 2S, 5R)-menthyl p-tolyl sulfinate and (+)-(S (S) )-[(p-tolyl)sulfinyl]ferrocene

机译:(-)-(S(S),1R,2S,5R)-薄荷基对甲苯基亚磺酸盐和(+)-(S(S))-[((对甲苯基)亚磺酰基]二茂铁的晶体结构

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摘要

The absolute configuration at the chiral sulfurs centers of (-)-(S (S) , 1R, 2S, 5R)-menthyl-p-tolylsulfinate (1) and (S (S) )-[(p-tolyl)sulfinyl]ferrocene (2) were determined by single crystal X-ray diffraction with anomalous dispersion effects and the corresponding calculation of Flack's absolute structure parameters. Both compounds crystallize in the monoclinic crystal system in space group P2(1) (no. 4); chiral sulfinate ester 1: a = 8.2868(6), b = 6.1399(3), c = 16.366(2) angstrom, beta = 91.816(6)degrees, V = 832.3(2) angstrom(3), Z = 2 and absolute structure parameter -0.03(7); chiral ferrocenyl sulfoxide 2: a = 5.8371(3), b = 15.390(2), c = 16.143(2) angstrom, beta = 97.748(6)degrees, V = 1436.9(3) angstrom(3), Z = 4 and absolute structure parameter +0.01(1). The trigonal pyramidal geometry at the chiral sulfur atom of 2 is close to expected values while the one of 1 is slightly distorted. With direct determination of the absolute configuration at the chiral sulfur centers an important gap concerning the widely used precursors 1 and 2 for the syntheses of chiral sulfoxides and 1,2-disubstituted planar chiral ferrocenyl ligands is now closed. The latter substance class is playing a key role in enantioselective catalysis.
机译:(-)-(S(S),1R,2S,5R)-薄荷基-对-甲苯基亚磺酸盐(1)和(S(S))-[((对-甲苯基)亚磺酰基]的手性硫中心的绝对构型通过具有异常色散效应的单晶X射线衍射和Flack的绝对结构参数的相应计算来确定二茂铁(2)。两种化合物均在空间群P2(1)(第4号)的单斜晶体系统中结晶。手性亚磺酸酯1:a = 8.2868(6),b = 6.1399(3),c = 16.366(2)埃,β= 91.816(6)度,V = 832.3(2)埃(3),Z = 2和绝对结构参数-0.03(7);手性二茂铁亚砜亚砜2:a = 5.8371(3),b = 15.390(2),c = 16.143(2)埃,beta = 97.748(6)度,V = 1436.9(3)埃(3),Z = 4和绝对结构参数+0.01(1)。手性硫原子为2时的三角锥几何形状接近预期值,而1中的一个略微变形。通过直接确定手性硫中心的绝对构型,现已关闭了关于广泛使用的用于合成手性亚砜和1,2-二取代的平面手性二茂铁基配体的前体1和2的重要空白。后一类物质在对映选择性催化中起关键作用。

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