A metal‐free, one‐potsynthesis of 1,2‐naphthoquinone was accomplished from 2‐naphthol by utilizing economically cheap NBS under open air conditions. Initial formation of 1,1‐dibromonaphthalen‐2‐one and subsequent transformation afforded the 1,2‐naphthoquinone. This oxidation was completed within 30 min and had broad substrate scope. Moreover, this system tolerated heterocyclic systems and was also
The 3-substitution of naphthalene-1,2-diones with boronic acids: a C–H functionalization approach to novel spirooxazine photochromics
作者:Mark York
DOI:10.1016/j.tetlet.2012.02.082
日期:2012.4
The addition of alkyl and aryl boronic acids to naphthalene-1,2-diones in the presence of an excess of ammonium persulfate and catalytic silvernitrate to yield 3-functionalized naphthalene-1,2-diones is reported. The products of these reactions were then further processed to yield the corresponding novel spirooxazine photochromic dyes.