Allylic strain(also known asA1,3strain,1,3-allylic strain, orA-strain) inorganic chemistryis a type ofstrain energyresulting from the interaction between a substituent on one end of an olefin with an allylic substituent on the other end.[1]If the substituents (R and R') are large enough ...
烯丙位张力 (也被称为1,3-烯丙位张力).doc,Allylic strain (also known as A1,3 strain, 1,3-allylic strain, or A-strain) in HYPERLINK /wiki/Organic_chemistry \o Organic chemistry organic chemistry is a type of HYPERLINK /wiki/Strain_energy \o Strain energy st
Bach, T.; Jodicke, K.; Kather, K.; Frohlich, R. 1,3-Allylic strain as a control element in the Paterno-Buchi reaction of chiral silyl enol ethers: Synthesis of diastereomerically pure oxetanes containing four contiguous stereogenic centers. J. Am. Chem. Soc. 1997, 119, 2437-2445....
strain,1,3-allylicstrain,orA-strain)inorganic chemistryisatypeofstrainenergyresultingfromtheinteractionbetweena substituentononeendofanolefinwithanallylicsubstituentontheotherend. [1] Ifthe substituents(RandR')arelargeenoughinsize,theycanstericallyinterferewitheach othersuchthatoneconformerisgreatlyfavoredoverthe...
W. Allylic 1,3-Strain as a Controlling Factor in Stereoselective Transformations. Chem. Rev. 1989, 89, 1841- 1860.Hoffmann, R. W. Allylic 1,3-strain as a controlling factor in stereoselective transformations. Chem. Rev. 89, 1841-1860 (1989)....
An allylic 1,3-strain-controlled diastereoselective photochromic ring-closing reaction of a bisthienylethene showed as high as 88% diastereomer excess (de)... Y Yokoyama,M Kose - 《Journal of Photochemistry & Photobiology A Chemistry》 被引量: 42发表: 2004年 Investigations into the biosynthesis ...
10. Stereocontrol of palladium(ii)-catalysed aza-Claisen rearrangements using a combination of 1,3-allylic strain and a solvent mediated directing effect† Michael D. Swift,Andrew Sutherland Org. Biomol. Chem., 2006,4, 3889-3891 Related Categories Solvents and Organic Chemicals Organic Compound...
1,3-Allylic Strain as a Control Element in the Paternò−Büchi Reaction of Chiral Silyl Enol Ethers: Synthesis of Diastereomerically Pure Oxetanes C... The facial diastereoselectivity in the Paternò−Büchi reaction of chiral silyl enol ethers and benzaldehyde was studied. The substituents ...
allylic strainNMRchemoselectivityazetidinesReaction of 3-amino- or 3-methylamino-1,2,3-triphenylpropyl chlorides (6 or 7) with potassium ethylxanthate leads to 4.5.6-triphenyl-tetrahydro-,3-thiazine-2-thione 1 or 1-methyl-2,3,4-triphenylazetidine 8 depending on the N-substitution. ...
Reetz, Manfred TKayser, FrankHarms, KlausWILEY‐VCH VerlagCheminformReetz M T,Kayser F,Harms K. Cycioaddition reactions of y-amino α,β-didehydro amino acid esters:A test case for the principle of 1,3-allylic strain[J].Tetrahedron Letters,1992.3453-3456....