10137-07-2Relevant articles and documents
Lewis base-catalyzed cyanation of Morita-Baylis-Hillman carbonates. Synthesis of allylamine derivatives
Ma, Hai,Sui, Feng,Zhao, Qing-He,Zhang, Ning,Sun, Yi,Xian, Jing,Jiao, Meng-Jiao,Liu, Yu-ling,Wang, Zhi-Min
, p. 3410 - 3414 (2017/08/11)
DABCO-catalyzed cyanation of MBH carbonates via 1,3-proton shift transfer is reported. The adducts of cyanation are converted in one step to allylic amines derivatives. The salient features of this reaction include readily available starting materials, mild conditions, broad substrate scope, high efficiency and valuable further applications. The process of the 1,3-proton shift transfer was conducted by a joint research of NMR and DFT calculation.
Synthesis of 3-pyrrolin-2-ones by rhodium-catalyzed transannulation of 1-sulfonyl-1,2,3-triazole with ketene silyl acetal
Ran, Rui-Qiao,He, Jun,Xiu, Shi-Dong,Wang, Kai-Bing,Li, Chuan-Ying
, p. 3704 - 3707 (2014/08/05)
α-Imino rhodium carbenoids generated from 1-sulfonyl 1,2,3-triazole were applied to the 3 + 2 cycloaddition with ketene silyl acetal, offering a novel and straightforward synthesis of biologically interesting compound 3-pyrrolin-2-one with broad substrate scope.
Aromatic congeners of bilirubin: Synthesis, stereochemistry, glucuronidation and hepatic transport
Brower, Justin O,Lightner, David A,McDonagh, Antony F
, p. 7813 - 7827 (2007/10/03)
A new synthetic analog (1) of the bile pigment bilirubin-IXα (bilirubin, Fig. 1) with phenyl groups replacing vinyl was prepared by a constitutional scrambling reaction of a mixture of two new, symmetric phenylrubin analogs (2 and 3) of bilirubin-XIIIα and IIIα. The former (2) with two endo-phenyls, and the latter (3) with two exo-phenyls were synthesized by condensation of a dipyrrylmethane dialdehyde with appropriate methylphenylpyrrolinones, which were prepared in several steps from 4-methyl-3-phenyl-2-(p-toluenesulfonyl)pyrrole, obtained by the Barton-Zard pyrrole synthesis. Nuclear Overhauser effect 1H NMR studies of 1-3 confirm that, like their bilirubin equivalents, these yellow-orange pigments adopt an intramolecularly hydrogen-bonded ridge-tile conformation. Reverse phase HPLC and TLC suggest that 3 is less polar than 2, and that 1 has intermediate polarity. Large differences in the induced circular dichroism spectra of 1-3 were found in pH 7.4 aqueous buffered solutions of human serum albumin. Despite the presence of bulky, lipophilic phenyl groups, 1-3 are metabolized like natural bilirubin in rats and require glucuronidation by the same enzyme for canalicular secretion from the liver into bile. However, there are striking qualitative differences between the three pigments in the ratio of mono- to diglucuronides formed. Phenyl substituents at the exo positions of the lactam rings diminish the proportion of diglucuronide more than phenyl substituents at the endo positions.