5177-39-9Relevant articles and documents
BENZODIAZEPINE DERIVATIVE AND METHOD OF PRODUCING THE SAME
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Paragraph 0016; 0045; 0046, (2015/09/28)
In a benzodiazepine derivative and a method of producing the derivative, isatoic anhydride or 5-chloroisatoic anhydride is reacted with amino acid ester hydrochloride for conducting a simple cyclization to obtain a produce with a low percentage of by-prod
A novel one step approach to the synthesis of 3H-1,4-benzodiazepin-(1H,4H)-2,5-diones from 1,2,3-benzotriazin-4-(3H)-one
Gupta, Renu,Sirohi, Reenu,Shastri, Sudha,Kishore
, p. 363 - 366 (2007/10/03)
1,2,3-Benzotriazin-4-(3H)-one(3) and its 6-chloro derivative (4) on thermal condensation with α-amino acids yielded 3H-1,4-benzodiazepin-(1H,4H)-2,5-diones(7-12) in moderate to good yield. The cyclocondensation is believed to proceed through the formation of an iminoketene intermediate (5).
New Synthesis of Diazepam
Gates, Marshall
, p. 1675 - 1681 (2007/10/02)
An efficient preparation of 7-chloro-1-methyl-3,4-dihydro-1H-1,4-benzodiazepine-2,5-dione from 5-chloro-N-methylisatoic anhydride and glycine has been devised, and from it, by the action of phenylmagnesium chloride on its N-acetyl-derivative followed by treatment with hydroxylamine and cleavage of the resulting desacetyl oxime with sodium bisulfite, diazepam has been synthesized.The overall yield is about 50percent from 5-chloroisatoic anhydride.