Synthesis of Enantiomerically Pure 1,5,5-Trideuteratedcis- andtrans-2,4-Dioxa-3-phosphadecalins.31P-NMR Evidence of Covalent-Bond Formation and the Stereochemical Implications in the Course of the Inhibition ofδ-Chymotrypsin
作者:Markus J. Stöckli、Peter Rüedi
DOI:10.1002/hlca.200790215
日期:2007.11
The irreversible inhibition of δ-chymotrypsin with the enantiomericallypure, P(3)-axially and P(3)-equatorially X-substituted cis- and trans-configurated 2,4-dioxa-3-phospha(1,5,5-2H3)bicyclo[4.4.0]decane 3-oxides (X=F, 2,4-dinitrophenoxy) was monitored by 31P-NMR spectroscopy. 1H-Correlated 31P2H}-NMR spectra enabled the direct observation of the vicinal coupling (3J) between the P-atom of the inhibitor
δ-胰凝乳蛋白酶的对映体纯,P(3)轴向和P(3)-赤道X取代的顺式和反式配置的2,4-dioxa-3-phospha(1,5,5- )的不可逆抑制通过31 P-NMR光谱监测2 H 3)双环[4.4.0]癸烷3-氧化物(X = F,2,4-二硝基苯氧基)。1个H-相关31 p 2 H} -NMR光谱使邻位耦合的直接观察(3 Ĵ抑制剂的P-原子和CH之间)2的Ser O部分195(= '序列195 '(C高2O)),从而在受抑制的酶中建立了'Ser 195 '(CH 2 OP)键的共价性质。磷酸化的立体化学过程取决于抑制剂的结构,并且发现在P原子上纯净的反转,反转和保留以及构型的净保留。