Chang, Meng-Yang published the artcileCopper(II) Acetate Mediated Synthesis of 3-Sulfonyl-2-aryl-2H-chromenes, COA of Formula: C11H8O3, the publication is Synthesis (2019), 51(18), 3419-3430, database is CAplus.
This paper describes a concise, easy-operation, high-yielding method for the synthesis of 3-sulfonyl-2-aryl-2H-chromenes I [R = Me, n-Bu, 4-H3CC6H4, etc.; R1 = H; R2 = H, OCH3; R1R2 = -CH=CH-CH=CH-; R3 = H, Cl, Br; Ar = 2-furyl, 2-naphthyl, 3,4,5-(H3CO)3C6H2, etc.] by a one-pot, straightforward two-step synthetic route, which includes (i) Cu(OAc)2/PyBOP-mediated intermol. [4+2] annulation of substituted salicylic acids 2-OH-3-R1-4-R2-5-R3C6HC(O)OH with β-sulfonylstyrenes ArCH=CHS(O)2R in the presence of DMAP in refluxing DMF, and (ii) sequential O-alkylation of the resulting sulfonylflavanones II with Bu bromide. A plausible mechanism is proposed and discussed. This protocol provides a highly effective annulation via one carbon-oxygen (C-O) and one carbon-carbon (C-C) bond formations.
Synthesis published new progress about 86-48-6. 86-48-6 belongs to alcohols-buliding-blocks, auxiliary class Organic Pigment,Natural product, name is 1-Hydroxy-2-naphthoic acid, and the molecular formula is C11H8O3, COA of Formula: C11H8O3.
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