A13C NMR study of some di-, tetra-, and hexa-hydropyridazines
作者:Thomas H. Fisher、Jody C. Crook、Shiching Chang
DOI:10.1016/s0040-4020(01)81649-5
日期:——
The room-temperature 13C nmr spectra of ten hydropyridazines were analyzed in an attempt to determine the most stable conformatlons(s) of each. In contrast to earlier findings, dihydropyridazine 1 was found to be planar. The most stable conformations of tetrahydropyridazines 2b and 2d were found to be half-chairs, while tetrahydropyridazines 3b and 3c were most probably in boat configurations with
分析了十种氢哒嗪的室温13 C nmr光谱,以试图确定每一种的最稳定构象。与早期发现相反,发现二氢哒嗪1是平面的。发现四氢哒嗪2b和2d的最稳定构象是半椅子,而四氢哒嗪3b和3c最可能是在船构型中,3,6-取代基都位于假赤道位置。4,5-二溴六氢哒嗪4a和4b的13 C nmr光谱与通过轴向-赤道氮反转形成的三个椅子构象的混合物一致。
JENSEN, FRANK;FOOTE, CHRISTOPHER S., J. AMER. CHEM. SOC., 109,(1987) N 21, 6376-6385
作者:JENSEN, FRANK、FOOTE, CHRISTOPHER S.
DOI:——
日期:——
Reaction of 4-phenyl-1,2,4-triazoline-3,5-dione with substituted butadienes. A nonconcerted Diels-Alder reaction
作者:Frank Jensen、Christopher S. Foote
DOI:10.1021/ja00255a024
日期:1987.10
Un mecanisme faisant intervenir la formation initiale d'un aziridinium imide, qui s'ouvre ensuite en une betaine-1,4, peut rendre compte de toutes les observations et est en accord avec les calculs de mecanique moleculaire
Un mecanisme faisant intervenir laformation initiale d'un aziridiniumimide, qui s'ouvre ensuite en une betine-1,4, peut rendre compte de toutes les观察等
Copper(II)-catalyzed aerobic oxidation of hydrazides to azo intermediates and their Diels–Alder versus ene trapping