632340-57-9Relevant articles and documents
One-Pot Synthesis of 3-(1,2,3,4-Tetrahydroisoquinolin-1-yl)-isoquinolin-1(2 H)-ones by DEAD-Promoted Oxidative Ugi-Wittig -Reaction Starting from Phosphonium Salt Precursors
Zhao, Long,Yang, Mao-Lin,Sun, Mei,Ding, Ming-Wu
supporting information, p. 66 - 69 (2021/11/16)
A new one-pot synthesis of 3-(1,2,3,4-tetrahydroisoquinolin-1-yl)-isoquinolin-1(2H)-ones by DEAD-promoted oxidative Ugi Wittig reaction was developed. The sequential reactions of (2-carboxybenzyl)triphenylphosphonium salts, isocyanides, and N-aryl-1,2,3,4
Method for synthesizing roxadustat intermediate
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Paragraph 0023-0058, (2019/12/08)
The invention belongs to the technical field of chemical preparation, and discloses a method for synthesizing a roxadustat intermediate. The method comprises the following steps: mixing 4-bromo-2-methylbenzoic acid and a solvent to obtain a mixture 1, adding N-bromosuccinimide and an initiator into the mixture 1, performing uniform mixing to obtain a mixture 2, and performing a reaction to obtainthe roxadustat intermediate 5-bromophthalide. The method provided by the invention has the following advantages: the method for synthesizing the roxadustat intermediate provided by the invention adopts the 4-bromo-2-methylbenzoic acid as the reaction raw material, the raw material is simple and easy to obtain, the costs are low, the reaction is easy to control, and the final product 5-bromophthalide has a yield of 96.5% or more and purity of 98.5% or more.