1,3-Dipolar cycloaddition of nitrile oxides to 2(5H)-furanones substituted at the 5-position by sulphur bearing groups
作者:Raquel Alguacil、Francisco Fariña、M.Victoria Martín
DOI:10.1016/0040-4020(96)00025-7
日期:1996.3
The behavior of the furanones 1–4 towards nitrile oxides 5–7 has been investigated, in particular with respect to the regio- and stereoselectivity. Cycloaddition of benzonitrile oxide (5) to 4,5-diethylsulphonylfuran-2(5H)-one (12) leads as sole addition product to the isoxazoline 30, that was easily aromatized to the isoxazole derivative 31, which is a useful synthon for the preparation of heteroanthracyclinone
已经研究了呋喃酮1-4对一氧化氮5-7的行为,特别是在区域和立体选择性方面。苯甲腈氧化物(5)环加成4,5-二乙基磺酰基呋喃-2(5 H)-一(12)作为唯一的加成产物异恶唑啉30,易加香成异恶唑衍生物31,这是有用的合成子杂蒽环酮类似物的制备。