BARBARALYLIDENE, A NEW TYPE OE NUCLEOPHILIC CARBENE
摘要:
这项研究的目的是阐明亚乙基巴巴拉酮(II)的性质。对巴拉酮对甲苯磺酰腙钠盐(III)进行真空热解,主要得到乙炔基环庚三烯(IV、V 和 VI)。由 III 衍生出的碳烯(II)不会与富含电子的烯烃发生反应,而是会与富马酸二甲酯、马来酸酯或丙烯酸甲酯等缺电子的烯烃发生反应,除 VIII 或 IX 外,还可得到螺环丙烷衍生物(VII 或 XII)。
5-Tetracyclo[3.3.0.02,4.03,6]oct-7-enyl carbene; an attempted synthesis of a [4.4.4.4]fenestrane derivative
作者:J. Stapersma、I.D.C. Rood、G.W. Klumpp
DOI:10.1016/0040-4020(82)80192-0
日期:1982.1
The title carbene was generated at low temperature with the objective to effect intramolecular cyclopropanation of its double bond. Labelling studies showed intramolecular CC bond insertion followed by intramolecular reverse Diels Alder reaction to be the major pathway to the products.
This study was carried out to elucidate the properties of barbaralylidene (II). Vacuum thermolysis of sodium salt of barbaralone tosylhydrazone (III) afforded mainly ethynylcycloheptatrienes (IV, V, and VI). The carbene (II), which was derived from III, did not add to electron-rich olefins, but instead added to electron-deficient olefins such as dimethyl fumarate, maleate or methyl acrylate to give spiro-cyclopropane derivatives (VII or XII) in addition to VIII or IX.
这项研究的目的是阐明亚乙基巴巴拉酮(II)的性质。对巴拉酮对甲苯磺酰腙钠盐(III)进行真空热解,主要得到乙炔基环庚三烯(IV、V 和 VI)。由 III 衍生出的碳烯(II)不会与富含电子的烯烃发生反应,而是会与富马酸二甲酯、马来酸酯或丙烯酸甲酯等缺电子的烯烃发生反应,除 VIII 或 IX 外,还可得到螺环丙烷衍生物(VII 或 XII)。