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8-acetyl-5-(benzyloxy)-2H-benzo[b][1,4]oxazin-3(4H)-one synthesis

5synthesis methods
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Yield:1035229-32-3 95%

Reaction Conditions:

Stage #1: 1‐(3‐amino‐4‐(benzyloxy)‐2‐hydroxyphenyl)ethanone;chloroacetyl chloridewith sodium hydrogencarbonate in N,N-dimethyl-formamide; for 2 h;Inert atmosphere;
Stage #2: with caesium carbonate in N,N-dimethyl-formamide at 100; for 20 h;Inert atmosphere;

References:

Sweis, Ramzi F.;Wang, Zhi;Algire, Mikkel;Arrowsmith, Cheryl H.;Brown, Peter J.;Chiang, Gary G.;Guo, Jun;Jakob, Clarissa G.;Kennedy, Steven;Li, Fengling;Maag, David;Shaw, Bailin;Soni, Nirupama B.;Vedadi, Masoud;Pappano, William N. [ACS Medicinal Chemistry Letters,2015,vol. 6,# 6,p. 695 - 700] Location in patent:supporting information