Nitromethane as a Carbanion Source for Domino Benzoannulation with Ynones: One‐Pot Synthesis of Polyfunctional Naphthalenes and a Total Synthesis of Macarpine
applicability has been devised for the regioselective synthesis of polyfunctional naphthalenes by employing nitromethane and ortho‐haloaryl ynones. Utilization of nitromethane as a one carbon carbanion source that is incorporated into a variety of ynones, ends up as an aromatic nitro substituent. The application of this domino process towards a total synthesis of the polycyclic alkaloid macarpine demonstrate
的单釜,过渡金属-自由,多米诺迈克尔/ S Ñ普遍适用性的Ar协议已经通过使用硝基甲烷和设计用于多官能萘的区域选择性合成邻-haloaryl ynones。硝基甲烷作为一种碳碳负离子源的使用,并被引入到各种炔酮中,最终以芳族硝基取代基的形式出现。该多米诺法在多环生物碱马卡平的全合成中的应用证明了该方法的有效性。在概念上是简单的方法来影响ynones显示广泛的底物范围和官能团耐受性,并已与被取代的硝基甲烷实现的区域选择性,多功能benzoannulation以及与脂环ö-单倍体。
Chemical transformation of protoberberines. XVI. Regioselective introduction of an oxy functionality at the C12-position of the benzo(c)phenanthridine skeleton: A convenient synthesis of macarpine from oxychelirubine.
A novel method for the introduction of an oxy functionality at the C12-position of the benzo[c]phenanthridine skeleton was developed. The method was successfully applied to a biomimetic synthesis of macarpine (3) from oxychelirubine (15), which was easily derived from the corresponding protoberberine (9).
Synthesis of macarpine and its cytotoxicity: Toward a synthetic route for 12-alkoxybenzo[c]phenanthridine alkaloids through aromatic nitrosation under basic condition
作者:Tsutomu Ishikawa、Tatsuru Saito、Hisashi Ishii
DOI:10.1016/0040-4020(95)00460-p
日期:1995.7
Macarpine (1), a 2, 3, 7, 8, 10, 12-hexaoxygenated benzo[c]phenanthridine alkaloid (O-6 base), was effectively synthesized from sesamol methyl ether (7) through the newly developed aromatic nitrosation under basic condition. The tests for the cytotoxicity of 1 and its analogous 2, 3, 7, 8, 10-pentaoxygenated (O-5) bases 23, 24 against HeLa S3 tumor cell showed that 1 exhibited the highest activity among them.
HANAOKA, MIYOJI;CHO, WON JEA;YOSHIDA, SHUJI;FUEKI, TSUKASA;MUKAI, CHISATO, CHEM. AND PHARM. BULL., 38,(1990) N2, C. 3335-3340
作者:HANAOKA, MIYOJI、CHO, WON JEA、YOSHIDA, SHUJI、FUEKI, TSUKASA、MUKAI, CHISATO
DOI:——
日期:——
SLAVIK, JIRI;HANUS, VLADIMIR;SLAVIKOVA, LEONORA, COLLECT. CZECHOSL. CHEM. COMMUN., 56,(1991) N, C. 1116-1122