Synth�se et propri�t�s photochromiques de 1, 3-dihydrospiro[2H-indole-2,3?-[3H]pyrimido[5,4-f][1,4]benzoxazines] et de 1,3-dihydrospiro[2H-indole-2,7?-[7H]thiazolo[5,4-f][1,4]benzoxazines]
Synthesis and Photochrmic Characteristics of 1,3-Dihydrospiro[2H-indole-2,3′-[3H-]pyrimido[5,4-f][1,4]benzoxazines] and 1,3-Dihydrospiro[2H-indole-2,7′[7H]thiazolo[5,4-f][1,4]benzoxazines]
的合成和特性Photochrmic 1,3-二氢螺[2H-吲哚-2,3' - [3H-]嘧啶并[5,4-f]的[1,4]苯并恶嗪]和1,3-二氢螺[2 ħ -吲哚-2,7'[7 H ]噻唑洛[5,4- f ] [1,4]苯并恶嗪]
Styryl-substituted spirochromenes of the indoline series
作者:E. V. Braude、M. A. Gal'bershtam
DOI:10.1007/bf00480363
日期:1979.2
On the reactivity of some 2-methyleneindolines with β-nitroenamines, α-nitroalkenes, and 1,2-diaza-1,3-butadienes
A study of the behaviour of some electron-rich 2-methyleneindolines (1-3) with different electron-poor reagents (formation of new carbon-carbon and nitrogen-carbon bonds) has furnished interesting results from both synthetic and the mechanistic viewpoints. Enamines 1-3 have been reacted with the beta-nitroenamines 4-7 (reaction CeCl3 center dot 7H(2)O promoted), giving the polymethine dyes 14-23. The same bases 1-3 have been nitroalkylated with the nitroolefins 8-10, furnishing the indolines 24-32, and the diastereoselectivity of the reaction has been thoroughly investigated. The most unexpected results derived from the first example of reaction of Fischer's bases with 1,2-diaza-1,3-butadienes. In fact, with 11-13, the 'unknown' indoline spirodihydropyrroles 33-40 were formed. Their structures were unambiguously assigned, and we determined, as an example, that of 33 by X-ray analysis. (c) 2006 Elsevier Ltd. All rights reserved.
Plancher, Gazzetta Chimica Italiana, 1898, vol. 28, p. II; 36
作者:Plancher
DOI:——
日期:——
Plancher, Gazzetta Chimica Italiana, 1898, vol. 28 II, p. 397