作者:Wolfgang Kirmse、Pham van Chiem、Paul-Georg Henning
DOI:10.1016/s0040-4020(01)96385-9
日期:1985.1
opylidenes (95,97) were generated from the corresponding nitrosoureas in methanol at room temperature. The diazo route is initiated by the formation of 2-vinylcyclopropanediazonium ions (e.g.43) which do not undergo 1,3-carbon shifts. No cyclopentenyl products were found in weakly basic methanol where the diazonium ions prevail. Ring opening of the diazonium ions gives pentadienyl cations and products
Alkali aza-, phospha- and arsacyclopentadienides and their chemical properties
作者:E.H. Braye、I. Caplier、R. Saussez
DOI:10.1016/s0040-4020(01)91719-3
日期:1971.1
is reacted with an alkali metal in an inert solvent, the phenyl group is split off yielding the corresponding alkali heterocyclopentadienide. Hydrolysis of the alkali phosphacyclopentadienides gave the first P-unsubstituted phospholes (7a, 7b, 10). Similarly, this method allows the dephenylation of N-phenyl substituted pyrroles. Reaction of the alkali phospholides with alkyl halides offers a convenient
Stereochemistry of Dehydrogenation of 1,4,-Cyclohexadiene with 2,3-Dichloro-5,6-dicyano-<i>p</i>-benzoquinone
作者:Paul Müller、Daniel Joly、François Mermoud
DOI:10.1002/hlca.19840670113
日期:1984.2.1
cis- and trans-(3,6-D2)-1,4-cyclohexadienes 1a and 1b have been synthesized from cis-3,4-dichlorocyclobutene (5). Aromatization to benzene with DDQ is cis-stereospecific with an uncertainty of 5%. This result is discussed in relation to concerted or stepwise mechanisms for aromatization of 1,4-dihydroaromatics with 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ).
Rotational analysis of bands in the high-resolution infrared spectra of the three species of butadiene-1,4-d2; refinement of the assignments of the vibrational fundamentals
作者:Norman C. Craig、Keith A. Hanson、Richard W. Pierce、Scott D. Saylor、Robert L. Sams
DOI:10.1016/j.jms.2004.07.001
日期:2004.12
butadiene-1,4- d 2 have been extended and improved from investigations of their Raman spectra as well as their infrared (IR) spectra. High-resolution IR spectra have been recorded for the three isotopomers, and a rotationalanalysis has been completed for strong bands of each species. Ground state and some upper state rotational constants have been fit. Corresponding ground state moments of inertia compare
1-AMINO-2-VINYL CYCLOPROPANE CARBOXYLIC ACID AMIDE, SALT OF SAME, AND METHOD FOR PRODUCING SAME
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP2725012A1
公开(公告)日:2014-04-30
The present invention relates to 1-amino-2-vinylcyclopropane carboxylic acid amide or a salt thereof. By obtaining optically active 1-amino-2-vinylcyclopropane carboxylic acid amide or a salt thereof by hydrolyzing optically active 1-amino-2-vinylcyclopropane carbonitrile or a salt thereof according to the production method of the present invention, 1-amino-2-vinylcyclopropane carboxylic acid amide or a salt thereof, which is useful as a pharmaceutical/agrochemical intermediate, can be easily obtained. The present invention is capable of providing a substrate to be subjected to optical resolution, which enables the production of optically active 1-amino-2-vinylcyclopropane carboxylic acid, which is widely used as a raw material for pharmaceutical and agrochemical products and is especially important as an intermediate for therapeutic agents for hepatitis C, inexpensively with high purity and high yield.