PREPARATION METHODS OF 4-ACETYL-2,3,4,5-TETRAHYDRO- BENZO[1,4]DIAZEPINE AND THEIR INTERMEDIATES

WIPO Patent Application WO/2008/145010

A1

Preparation methods of 4-acetyl-2,3,4,5-tetrahydro-benzo[1,4]diazepine and their intermediates. Compounds represented by the formula I and II. The preparation methods of 4-acetyl-2,3,4,5-tetrahydro-benzo[1,4]diazepine in which compounds represented by the formula I and II and o-nitrobenzaldehyde are used. These methods are absolutely novel synthetic routes for preparation of 4-acetyl-2,3,4,5-tetrahydro -benzo[1,4] diazepine. The routes are short and easy to operate and raw materials are readily available. The routes are economical and safe without using costly and unsafe lithium aluminium hydride.

WO/1999/008995	METHOD FOR TREATING AQUEOUS SOLUTIONS COMPRISING ACIDS AND NITRATED COMPOUNDS
JPH0729991	[Title of the Invention] 1- (4-Methylstyryl) -3- (4-nitrostyryl) benzene and its production method
JPH05158092	ORGANIC NONLINEAR OPTICAL MATERIAL AND ORGANIC NONLINEAR OPTICAL ELEMENT USING THE MATERIAL

ZHU FUQIANG (CN)
LI HAIHONG (CN)
WANG WENZHONG (CN)
ZHANG HUI (CN)
SHEN JINGSHAN (CN)

PCT/CN2008/001001

December 04, 2008

May 22, 2008

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TOPHARMAN SHANGHAI CO LTD (CN)
WEIFANG TEHUA CHEMICAL CO LTD (CN)
ZHU FUQIANG (CN)
LI HAIHONG (CN)
WANG WENZHONG (CN)
ZHANG HUI (CN)
SHEN JINGSHAN (CN)

C07C205/06; C07D243/14

CN1596114A	2005-03-16
CN1214685A	1999-04-21

SABB A.L. ET AL.: "Cycloalkyl[b][1,4]benzodiazepinoindoles are agonists at the human 5-HT2C receptor", BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, vol. 14, no. 10, 2004, pages 2603 - 2607, XP004841249
See also references of EP 2163538A4

KINGSOUND & PARTNERS (Block B Kingsound International Center, 116 Zizhuyuan Road, Haidian District, Beijing 7, CN)

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