The chemistry of indoles. XXIV. Syntheses of 3-indoleacetic acid and 3-indoleacetonitrile having a halogeno group and a carbon functional group at the 4-position.
作者:MASANORI SOMEI、KIYOMI KIZU、MASAKO KUNIMOTO、FUMIO YAMADA
DOI:10.1248/cpb.33.3696
日期:——
Various 4-halogeno-3-indoleacetic acids and -3-indoleacetonitriles were synthesized for the first time by means of the Sandmeyer or Schiemann reaction, demonstrating the versatility of 4-indolediazonium salts in 4-substituted indole chemistry. A practical synthetic method for 4-halogenoindoles was developed by regio-selective thallation-halogenation, and the products were also led to 4-halogeno-3-indoleacetic acids. The first synthesis of 4-formyl-3-indoleacetonitrile is also reported.
首次合成了多种4-卤代-3-吲哚乙酸和-3-吲哚乙腈,采用了桑德梅耶反应或施密特反应,展示了4-吲哚二氮盐在4-取代吲哚化学中的多样性。通过区域选择性的铊化-卤化开发了一种实用的4-卤代吲哚合成方法,所生成的产品也可转化为4-卤代-3-吲哚乙酸。此外,还报道了4-甲酰基-3-吲哚乙腈的首次合成。