3‐disubstituted phthalides in good to high yields at ambienttemperature. In a similar manner, 3‐hydroxyisoindolin‐1‐one and 3‐hydroxyoxindole derivatives could also be easily prepared by direct reductive coupling of phthalimides and N‐substituted isatins with activated alkenes, respectively. Application of this methodology towards the synthesis of 1‐naphthol derivatives on a gram scale is also depicted
Access to Naphthoic Acid Derivatives through an Oxabenzonorbornadiene Rearrangement
作者:Daniel Lücke、Alexander S. Campbell、Martin Petzold、Richmond Sarpong
DOI:10.1021/acs.orglett.3c02823
日期:2023.10.13
Herein, the synthesis of 1-hydroxy-2-naphthoic acid esters through an unexpected Lewis-acid-mediated 1,2-acyl shift of oxabenzonorbornadienes is reported. Using this methodology, novel substitution patterns for 1-hydroxy-2-naphtoic acid esters can be obtained. A mechanistic proposal and rationale for this transformation, the products of which had been previously incorrectly characterized, is given
Asymmetric dearomatization of benzyl 1-naphthyl ethers via [1,3] O-to-C rearrangement
作者:Hongkun Zeng、Gang Wen、Lili Lin、Xiaoming Feng
DOI:10.1039/d4cc02620a
日期:——
A catalytic asymmetric dearomatization reaction of benzyl 1-naphthyl ethers accelerated by a chiral N,N′-dioxide/Co(II) complex is disclosed. The reaction proceeds via an enantioselective [1,3] O-to-C rearrangement through a tight ion-pair pathway, providing a wide array of α-naphthalenone derivatives bearing an all-carbon quaternary center in high yields with excellent ee values.
公开了由手性N , N'-二氧化物/Co( II )络合物加速的苄基1-萘基醚的催化不对称脱芳构化反应。该反应通过紧密离子对途径进行对映选择性 [1,3] O-to-C 重排,以高收率和优异的 ee 值提供多种带有全碳四元中心的 α-萘酮衍生物。