Pictet–Spengler reaction in the synthesis of condensed benzodiazepines: synthesis of 11-hetaryl derivatives of 11,12-dihydroquinazolino[3,2-c][2,3]benzodiazepin-14(6H)-ones
作者:Andrey S. Tolkunov、Alexander V. Mazepa、Gennadiy V. Palamarchuk、Oleg V. Shishkin、Sergey Yu. Sujkov、Sergey L. Bogza
DOI:10.1007/s00706-016-1861-0
日期:2017.4
furyl)-11,12-dihydroquinazolino[3,2-c][2,3]benzodiazepin-14(6H)-one when treated with trifluoroacetic acid, and the structure of the product was determined by NMR (1H, 13C, HSQC, HMBC experiments) and mass spectrometry data. The crystal structure of 3-amino-2-[4,5-dimethoxy-2-[(5-oxofuran-2(5H)-yliden)methyl]benzyl]quinazolin-4(3H)-one was confirmed by single-crystal X-ray analysis. Graphical abstract
摘要合成了11,12-二氢喹唑啉代[3,2- c ] [2,3]苯并二氮杂-14-14(6 H)-one的新衍生物。通过3-氨基-2-(3,4-二甲氧基苄基)喹唑啉-4(3)的Pictet-Spengler反应制备11-(2-噻吩基)-和11-(5-R-2-呋喃基)-取代的化合物H)-在质子惰性介质中带有杂环醛。它们的化学结构通过1 H和13 C NMR光谱法和质谱法证实。我们观察到在8,9-二甲氧基-11-(5-氯-2-呋喃基)-11,12-二氢喹唑啉[3,2- c ] [2,3]苯并二氮杂-14-14 (6 H)中的二氮杂环打开。用三氟乙酸处理时为1个,并通过NMR测定产物的结构(1H,13 C,HSQC,HMBC实验)和质谱数据。一次确认了3-氨基-2- [4,5-二甲氧基-2-[(5-氧呋喃-2(5 H)-亚苯基)甲基]苄基]喹唑啉-4(3 H)-的晶体结构。-晶体X射线分析。 图形概要