Synthesis of Substituted 1H- and 3H-1-Benzazepines and Rearrangement of Alkyl 1H-1-Benzazepine-2-carboxylates into Isoquinolines
作者:Vijay Singh、Sanjay Batra
DOI:10.1002/ejoc.200700175
日期:2007.6
reduction of nitro groups in 2-nitro-4-(2-nitrobenzylidene)alkanoates and 4-nitro-2-(2-nitroalkylidene)alkanoates allows the facile synthesis of substituted 1H-1-benzazepines and 3H-1-benzazepines. This reaction proceeds via SN2′ reaction of ethyl nitroacetate and nitroethane with the acetyl derivatives of Baylis–Hillman adducts deriving from 2-nitro-substituted benzaldehydes. During the study, an unprecedented
Synthesis of 1,3-disubstituted naphthalenes from the Baylis–Hillman acetates with the aid of manganese(III) acetate
作者:Yang Jin Im、Ka Young Lee、Taek Hyeon Kim、Jae Nyoung Kim
DOI:10.1016/s0040-4039(02)00884-5
日期:2002.5
1,3-Disubstituted naphthalene derivatives can be easily synthesized from Baylis–Hillman acetates by successive reaction: (1) SN2′ type reaction with diethylmalonate or ethyl nitroacetate; (2) manganese(III) acetate-assisted radical cyclization and (3) aromatization with NaI/O2 system or elimination of nitrous acid.
1,3-二取代的萘衍生物可以通过以下反应容易地从Baylis-Hillman乙酸酯合成:(1)S N 2'型与丙二酸二乙酯或硝基乙酸乙酯的反应;(2)乙酸锰(III)辅助的自由基环化和(3)NaI / O 2体系的芳构化或亚硝酸的消除。
Ring expansion of indene by photoredox-enabled functionalized carbon-atom insertion
作者:Fu-Peng Wu、Chetan C. Chintawar、Remy Lalisse、Poulami Mukherjee、Subhabrata Dutta、Jasper Tyler、Constantin G. Daniliuc、Osvaldo Gutierrez、Frank Glorius
DOI:10.1038/s41929-023-01089-x
日期:——
carbyne precursor that facilitates the insertion of carbon atoms bearing a variety of functional groups, including trifluoromethyl, ester, phosphate ester, sulfonate ester, sulfone, nitrile, amide, aryl ketone and aliphatic ketone fragments to access a library of 2-substituted naphthalenes. The application of this methodology to the skeletal editing of molecules of pharmaceutical relevance highlights its
dirhodium complex Rh2(esp)2, α-diazo dibenzothiophenium salts generate highly electrophilic Rh-coordinated carbenes, which evolve differently depending on their substitution pattern. Keto-moieties directly attached to the azomethinic carbon promote carbene insertion into one of the adjacent C–S bonds, giving rise to highly electrophilic dibenzothiopyrilium salts. This intramolecular pathway is not operative