Phosphazene Superbase-Mediated Regio- and Stereoselective Iodoaminocyclization of 2-(1-Alkynyl)benzamides for the Synthesis of Isoindolin-1-ones
作者:Saurabh Mehta、Dhirendra Brahmchari
DOI:10.1021/acs.joc.9b00452
日期:2019.5.3
exclusive formation of products with Z-geometry (across the exo C═C bond) has been confirmed through X-raycrystallography. The methodology also provides an easy access to aristolactams, an important class of natural products. This has been successfully demonstrated by synthesizing two aristolactam derivatives (including Cepharanone B).
Regio- and Stereoselective Synthesis of Isoindolin-1-ones through BuLi-Mediated Iodoaminocyclization of 2-(1-Alkynyl)benzamides
作者:Dhirendra Brahmchari、Akhilesh K. Verma、Saurabh Mehta
DOI:10.1021/acs.joc.7b02903
日期:2018.3.16
A simple and straightforward synthesis of isoindolin-1-ones is reported. Exclusive N-cyclization of the amide functional group, an ambident nucleophile, was accomplished for the cyclization of 2-(1-alkynyl)benzamides using n-BuLi-I2/ICl. The methodology works with the primary amide and affords the desired isoindolinones in yields of 38–94%. Interestingly, the isolated products exhibit a Z-stereochemistry
Controlled Photochemical Synthesis of Substituted Isoquinoline-1,3,4(2<i>H</i>)-triones, 3-Hydroxyisoindolin-1-ones, and Phthalimides via Amidyl Radical Cyclization Cascade
We report a controlled radicalcyclizationcascade of isoquinoline-1,3,4(2H)-triones, 3-hydroxyisoindolin-1-ones, and phthalimides from o-alkynylated benzamides by metal-free photoredox catalyzed amidyl N-centered radicaladdition to the C–C triple bond using the proton-coupled electron transfer (PCET) process under mild reaction conditions. A time tunable synthesis of 3-hydroxyisoindolin-1-ones and
Nagarajan, A.; Balasubramanian, Tiruvenkat R., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1989, vol. 28, # 1-11, p. 67 - 68
作者:Nagarajan, A.、Balasubramanian, Tiruvenkat R.
DOI:——
日期:——
NAGARAJAN, A.;BALASUBRAMANIAN, TIRUVENKAT R., INDIAN J. CHEM. B, 28,(1989) N, C. 67-68