3761-94-2Relevant articles and documents
Photoinduced Fragmentation Borylation of Cyclic Alcohols and Hemiacetals
Aggarwal, Varinder K.,Madhavachary, Rudrakshula,Noble, Adam,Shu, Chao
supporting information, p. 7213 - 7218 (2020/10/12)
A visible-light photoinduced fragmentation borylation of O-phthalimido cycloalkanols with bis(catecholato)diboron is described. Structurally diverse keto and formyloxy alkyl boronic esters are shown to be conveniently prepared by radical-mediated ring opening of cyclic alcohols and hemiacetals, respectively. The reactions proceed under mild conditions in the absence of additives or photocatalysts, display excellent functional group tolerance, and are shown to allow cleavage of 4-, 5-, 6-, and 7-membered ring substrates. The mechanism proceeds via sequential homolytic N-O and C-C bond cleavages, the latter of which involves β-scission of an alkoxy radical, generating a carbonyl and an alkyl radical that is trapped by the diboron reagent. Spectroscopic studies suggest direct photoexcitation of either the phthalimide or diboron substrates with blue light can initiate a radical chain mechanism.
Azetidine derivatives and synthesis method thereof
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Paragraph 0063-0065, (2019/03/26)
The invention belongs to the field of chemical synthesis, and discloses an azetidine derivative and a synthesis method thereof. The structural formula of the target product azetidine derivatives is asshown in formulae (I), (II), (III), (IV) and (V). The compounds of the formulae are compounds containing an azetidine skeleton, and a nitrogen atom in the skeleton is protected by 2-picolinic acid. The target product azetidine derivatives can be: azetidinyl amide derivatives, azabicyclo[x.1.1] amide derivatives (x=3, 4, 5, 6, 7, 8, 9), azabicyclo[4.1.1] amide derivatives having a substituent at the ring, azabicyclo[4.2.0] amide derivatives and azetidine derivatives containing spirocyclic quaternary carbon. The azetidine derivatives of the present invention have certain protective effect on hydrogen peroxide-induced oxidative stress damage of HC cells.
Polycyclic Azetidines and Pyrrolidines via Palladium-Catalyzed Intramolecular Amination of Unactivated C(sp3)-H Bonds
Zhao, Jie,Zhao, Xiao-Jing,Cao, Pei,Liu, Ji-Kai,Wu, Bin
supporting information, p. 4880 - 4883 (2017/09/23)
A novel strategy to construct complex polycyclic nitrogen-containing heterocycles from aliphatic amines via picolinamide-assisted palladium-catalyzed C-H bond activation reaction was reported. The reaction exhibits broad substrate scope for the synthesis of various azabicyclic scaffolds, including azetidines and tropane-class alkaloids. Application of this method to naturally occurring (-)-cis-myrtanylamine, an unprecedented type of carbon-carbon bond activation, in which the electron-pair involved initiates an intramolecular "SN2-like" displacement of a cyclopalladium-fragment from a tertiary center, is described.
