The modified Pictet–Spengler reaction of phenylethylbenzene sulfonamide with a commercially available glyoxal to construct 1-benzoyl- and 1-acetyl-1,2,3,4-tetrahydroisoquinolines 9a–n has been reported. The reaction could be accomplished, regardless of the oxygenation pattern on the aromatic ring, leading to the N-sulfonyltetrahydroisoquinoline analogs which are versatile intermediates for the synthesis
New Syntheses of 1-Benzoyltetrahydroisoquinoline Derivatives Using Polymer-supported Bis(trifluoroacetoxyiodo)benzene
作者:Ling-Ching Chen、Hsin-Yu Huang、Rei-Sheu Hou、Huey-Min Wang
DOI:10.3987/com-05-10433
日期:——
The reaction of N-benzenesulfonyl-β-phenethylamines with α-benzoyl sulfides usingpolymer-supportedbis(trifluoroacetoxyiodo)benzene (PSBTI) gives moderate to good yields of the corresponding 1-benzoyltetrahydroisoquinoline derivatives.
Mechanistic Investigation, Wavelength-Dependent Reactivity, and Expanded Reactivity of N–Aryl Azacycle Photomediated Ring Contractions
作者:Sojung F. Kim、Henrik Schwarz、Justin Jurczyk、Bailey R. Nebgen、Hailey Hendricks、Hojoon Park、Andrew Radosevich、Michael W. Zuerch、Kaid Harper、Michaelyn C. Lux、Charles S. Yeung、Richmond Sarpong
DOI:10.1021/jacs.3c13982
日期:2024.2.28
Under mild blue-light irradiation, α-acylated saturatedheterocycles undergo a photomediated one-atom ring contraction that extrudes a heteroatom from the cyclic core. However, for nitrogenous heterocycles, this powerful skeletal edit has been limited to substrates bearing electron-withdrawing substituents on nitrogen. Moreover, the mechanism and wavelength-dependent efficiency of this transformation