SKEW-BOAT CONFORMATIONS FOR 2 SUGAR-DERIVED 5,6-DIHYDROPYRAN-2-ONES

被引：2

作者：

LICHTENTHALER, FW ^{[1
]}

LINDNER, HJ ^{[1
]}

RONNINGER, S ^{[1
]}

PAULUS, H ^{[1
]}

机构：

[1] FACHGEBIET STRUKTURFORSCH, D-64287 DARMSTADT, GERMANY

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 1994年 / 209卷 / 03期

关键词：

CRYSTAL STRUCTURE; ENOLLACTONES; PYRANOID; SKEW-BOAT (SB) RING CONFORMATION;

D O I：

10.1524/zkri.1994.209.3.274

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The structures for two sugar-derived 5,6-dihydropyran-2-ones were determined: (5R,6S)-3.5-bis-benzoyloxy-6-methyl-5,6-dihydro-2H-pyran-2-one (1), C20H16O6, P2(1)2(1)2(1), a = 27.610(9), b = 10.734(4), c = 5.972 (2) angstrom, Z = 4, R = 0.033, R(w) = 0.037, and (5S)-3,5-bisbenzoyloxy-5.6-dihydro-2H-pyran-2-one (2), C19H14O6, P2(1), a = 15.93 (1), b = 8.150 (5), c = 6.238 (5), beta = 99.43 (5)degrees, z = 2, R = 0.096, R(w) = 0.096. They adopt skew-boat (SB) solid-state conformations of the pyranoid ring, such that C-6, and, to a lesser degree, the ring oxygen lie above a plane made up of C-(2) - C-(3) - C-(4) - C-(5).

引用

页码：274 / 277

页数：4

共 6 条

[1]

LICHTENTHALER FW, 1993, LIEBIGS ANN CHEM, P975, DOI 10.1002/jlac.1993199301155

[2] ENANTIOPURE BUILDING-BLOCKS FROM SUGARS .16. SOLID-STATE CONFORMATIONS OF 2,6-CIS-SUBSTITUTED AND 2,6-TRANS-SUBSTITUTED DIHYDROPYRAN-3-ONES [J].

LICHTENTHALER, FW ;

RONNINGER, S ;

LINDNER, HJ ;

IMMEL, S ;

CUNY, E .

CARBOHYDRATE RESEARCH, 1993, 249 (02) :305-326

[3]

LICHTENTHALER FW, 1989, LIEBIGS ANN CHEM, P1153

[4]

LICHTENTHALER FW, 1992, MODERN SYNTHETIC MET, V6, P273

[5]

SHELDRICK GM, 1986, SHELX PROGRAM CRYSTA

[6]

SHELDRICK GM, 1976, SHELX PROGRAM CRYSTA

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