dl -apiose substituted with stable isotopes: Synthesis, N.M.R.-spectral analysis, and furanose anomerization
作者:Joseph R. Snyder、Anthony S. Serianni
DOI:10.1016/0008-6215(87)80046-0
日期:1987.8
The branched-chain pentose DL-apiose has been synthesized in good yield by a new and simple chemical method that can be adapted to prepare (1-13C)-, (2-13C)-, (1-2H)- and/or (2-2H)-enriched derivatives. N.m.r. spectra (1H- and 13C-) have been interpreted with the aid of selective (13C)- and (2H)-enrichment, and 2D and 13C[13C]-n.m.r. spectra. The solution composition of DL-(1-13C)apiose in 2H2O, determined
支链戊糖DL-apiose已通过一种新的简单化学方法以高收率合成,该化学方法适用于制备(1-13C)-,(2-13C)-,(1-2H)-和/或(2-2H)富集的衍生物。Nmr光谱(1H-和13C-)借助选择性(13C)-和(2H)富集以及2D和13C [13C] -nmr光谱进行了解释。已经发现通过13 C-nmr光谱法确定的DL-(1-13C)apiose在2H2O中的溶液组成不同于先前通过1H-nmr光谱法确定的溶液组成。已经测量了几种13C-1H和13C-13C偶合剂,并以呋喃呋喃糖环构象进行了解释。四种apiofuranoses [3-C-(羟甲基)-α-和-β-D-呋喃呋喃糖,以及3-C-(羟甲基)-α-和-β-L-呋喃呋喃糖]的开环常数是由13C饱和转移nm确定 河 光谱,并与先前获得的结构相关四呋喃糖酶进行比较。