Results 171 to 180 of about 272,115 (235)

Thermal Rearrangement of Acyl Azides (A Modified Curtius Rearrangement)

, 2005
M. R. Tracey, R. P. Hsung, J. Antoline, K. C. M. Kurtz, L. Shen, B. W. Slafer, Y. Zhang   +6 more
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Organophosphine-Mediated Skeletal Editing Synthesis of Benzo[e][1,3]thiazine-2,4(3H)-diones via Curtius Rearrangement.

Journal of Organic Chemistry
An organophosphine-promoted skeletal reorganization of benzo[c][1,2]dithiol-3-ones to forge benzo[e][1,3]thiazine-2,4(3H)-diones is demonstrated herein. This cascade reaction involves S-S bond cleavage followed by formal [4 + 2] cycloaddition of benzo[c][
Shanhong Yang, Kunwei Guo, Huizhi Hu, Xiaobing Liu, Yao Zhou, Shengzhou Jin   +5 more
semanticscholar   +1 more source

Curtius-Type Rearrangement of Sulfinyl Azides: A Matrix Isolation and Computational Study.

Journal of Physical Chemistry A, 2022
The highly unstable methyl sulfinyl azide, CH3S(O)N3, has been synthesized and characterized for the first time. In the gas phase, CH3S(O)N3 decomposes quickly at room temperature (300 K) with an estimated half-life (t1/2) of 7 min.
Zhuang Wu, Xiaoqing Zeng
semanticscholar   +1 more source

Direct Conversion of Carboxylic Acids to Various Nitrogen Containing Compounds in One-Pot Exploiting Curtius Rearrangement.

Journal of Organic Chemistry, 2019
Herein we report, a single pot multi-step conversion of inactivated carboxylic acids to various N-containing compounds using a common synthetic methodology, involving diphenyl phosphinic chloride as an activator and sodium azide as a source of nitrogen ...
Arun Kumar, Naveen Kumar, Ritika Sharma, G. Bhargava, Dinesh Mahajan   +4 more
semanticscholar   +1 more source

Decomposition of Sulfonyl Azide Isocyanate and Sulfonyl Diazide: The Oxygen-Shifted Curtius Rearrangement via Sulfonyl Nitrenes.

Journal of Physical Chemistry A, 2018
Sulfonyl azide isocyanate, (OCN)S(O)2N3, was prepared and characterized by IR (gas, matrix-isolation), Raman (liquid), and UV-vis spectroscopy. Upon flash vacuum pyrolysis (FVP) at ca.
Xuelin Dong, Guohai Deng, Jian Xu, Hongmin Li, Xiaoqing Zeng   +4 more
semanticscholar   +1 more source

Improved Preparation of Tyramine by Curtius Rearrangement

Chinese Journal of Chemistry, 2009
AbstractAn improved and facile preparation of tyramine [2‐(p‐hydroxyphenyl)ethylamine] was described, which starts from phenol and acrylonitrile to form β‐(p‐hydroxyphenyl) propionic acid via Friedel‐Craft's alkylation and nitrile hydrolysis. After hydrazinolysis and a subsequent Curtius rearrangement, tyramine was obtained in 30.2% total yield.
Yun LI, Fan YANG, Xiaoying XU, Shiyin PAN, Lixin WANG, Chuanqin XIA   +5 more
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Curtius-type rearrangement of a sulphonyl azide

Journal of the Chemical Society D: Chemical Communications, 1969
Six products have been identified from the thermolysis of mesitylene-2-sulphonyl azide in dodecane: two are derived from a Curtius-type rearrangement of the corresponding sulphonyl nitrene.
R. A. Abramovitch, W. D. Holcomb
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Synthesis of 2,2‐[60]Fullerenoalkylamines (IV) via the Curtius Rearrangement.

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Kazuhiko Saigo, Yasuhiro Ishida, Tomoyuki Tada   +2 more
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Stereospecificity of the Curtius rearrangement

Canadian Journal of Chemistry, 1968
Jones and Mason claimed a number of years ago (1) that rearrangement of cis-olefinic acyl azides gave trans-olefinic isocyanates. However, several other workers have found that rearrangement of an acyl azide group attached to an optically active carbon gives configurationally identical products, a discovery which apparently conflicts with Jones and ...
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One-Pot Curtius Rearrangement Processes from Carboxylic Acids

Synthesis, 2009
An efficient and practical synthesis of amine derivatives from carboxylic acids is described using new one-pot Curtius rearrange- ment processes. The preparation of carbamate-protected amines and anilines, as well as ureas was achieved in good to excellent yields on a multigram scale.
Hélène Lebel, Olivier Leogane
openaire   +1 more source