The title compound C18H16N2O5, has a pyran ring in a half-chair conformation fused to a benzene ring. The substituent groups at C3 and C5 are approximately coplanar with the benzopyran nucleus, with dihedral angles of 8.5 (5) and 4.2 (5)degrees, respectively. The benzoyloxy carbonyl group and the benzene ring of the benzopyran moiety both adopt a cis configuration.
The synthesis of a π-conjugated organophosphorus species with bridging P–P unit is reported. Because of the pyramidal geometry of the phosphorus centers, the molecular scaffold provides intriguing electronic communication throughout the three-dimensional structure via π-σ-π conjugation in stepwise fashion. The dimeric species was serendipitously found to be accessible via a reaction of the corresponding
Matrix-IR Spectroscopic Investigations of the Thermolysis and Photolysis of Diazoamides
作者:Curt Wentrup、Hervé Bibas、Arvid Kuhn、Ullrich Mitschke、Mark C. McMills
DOI:10.1021/jo401695x
日期:2013.11.1
Matrix photolysis of N,N-dialkyldiazoacetamides 1a–d at 7–10 K results in either the formation of C–H insertion products (in case of N,N-dimethyl and N,N-diethyl diazoamides) or almost exclusive Wolff rearrangement to ketenes (in the case of the cyclic diazoamides N-(diazoacetyl)azetidine and N-(diazoacetyl)pyrrolidine). This can be ascribed to higher activation barriers for the approach of the singlet
PROCESS FOR PREPARING DI-, TRI- AND POLYAMINES BY HOMOGENEOUSLY CATALYZED ALCOHOL AMINATION
申请人:SCHAUB Thomas
公开号:US20120232293A1
公开(公告)日:2012-09-13
Process for preparing primary amines which have at least one functional group of the formula (—CH
2
—NH
2
) and at least one further primary amino group by alcohol amination of starting materials having at least one functional group of the formula (—CH
2
—OH) and at least one further functional group (—X), where (—X) is selected from among hydroxyl groups and primary amino groups, by means of ammonia with elimination of water, wherein the reaction is carried out homogeneously catalyzed in the presence of at least one complex catalyst comprising at least one element selected from groups 8, 9 and 10 of the Periodic Table and also at least one donor ligand.
Heteroaliphatic Dimethylphosphine Oxide Building Blocks: Synthesis and Physico‐Chemical Properties
作者:Andrii Fedyk、Evgeniy Y. Slobodyanyuk、Olha Stotska、Bohdan V. Vashchenko、Dmitriy M. Volochnyuk、Dmitriy A. Sibgatulin、Andrey A. Tolmachev、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.202100581
日期:2021.12.21
Multigram synthesis of saturated heterocyclic dimethylphosphine oxides (derivatives of azetidine, pyrrolidine, piperidine, and morpholine) – advanced building blocks for medicinal chemistry – as well as their physico-chemical properties (pKa, logP, and Sw) are disclosed.
公开了饱和杂环二甲基氧化膦(氮杂环丁烷、吡咯烷、哌啶和吗啉的衍生物)的多克合成——药物化学的高级构建模块——以及它们的物理化学特性(p K a、log P和S w)。
Catalytic Oxidation of Amines Utilizing Binuclear Copper(II) Complex of 7-Azaindole
Treatment of benzylamine with a catalytic amount of a binuclear copper(II) complex of 7-azaindole 1 under an oxygen atmosphere at room temperature produced benzylidene-benzylamine and benzonitrile in good yields. This reaction is also applicable to other amines and gives the corresponding imines. Interestingly 1-phenylpyrrolidine was oxidized to cyclic dimers, but, in the presence of triethylamine
用催化量的 7-氮杂吲哚 1 的双核铜 (II) 配合物在氧气气氛下在室温下处理苄胺,以良好的收率产生了亚苄基-苄胺和苄腈。该反应也适用于其他胺并得到相应的亚胺。有趣的是,1-苯基吡咯烷被氧化成环状二聚体,但在三乙胺的存在下,它被氧化成相应的γ-内酰胺。