Phenyl-substituted cyclopentane- and cyclohexane-cis-fused-1,3-oxazines and -1,4-oxazepinones. Preparation and stereochemical study
作者:Géza Stájer、Angela E. Szabó、Samuel Frihpong-Manso、Gábor Bernáth、Pál Sohar
DOI:10.1016/s0040-4020(01)87873-x
日期:1990.1
3-oxazines and ,. From the aminoalcohol obtained by Na/EfcOH reduction of 2, the diastereomeric 4-phenyloxazine derivative 8 was obtained. 3 and 4 were transformed through carbamates to cis-5,6-trimethylene- and cis-5i6-tetramethylene-1, 3-oxazin-2-ones 3 and 10, while the analogous 2-thiones and were prepared dithiocarbamates. With phenyl isothiocyanate, furnished the 2-phenylimino-1,3-oxazine , while
环戊烯和环己烯的用苄腈氧化物(BHO)得到异恶唑啉1和2,将其还原为1,3-氨基醇的环加成和用LAH和环化以cycloalkane- -condensed 4-苯基-1,3-恶嗪及,。从通过Na / EfcOH还原2得到的氨基醇,获得非对映体4-苯基恶嗪衍生物8。将3和4通过氨基甲酸酯转化为顺式5,6-三亚甲基-和顺式1-5i6-四亚甲基-1、3-恶嗪-2-酮3和10,而类似的2-硫酮与二硫代氨基甲酸酯制备。用异硫氰酸苯酯提供2-苯基亚氨基-1,3-恶嗪,而1,4-氧杂ox酮(用氯乙酸乙酯和3-氯丙酸乙酯获得。通过ir,1 H和13 C-nmr研究阐明了新化合物的结构,包括构型和优选的构象。