5336-49-2Relevant academic research and scientific papers
Squaramide-catalysed asymmetric cascade reactions of 2,3-dioxopyrrolidines with 3-chlorooxindoles
Du, Da-Ming,Wen, Jiang-Bo
, p. 1647 - 1656 (2020)
A highly efficient method for the enantioselective construction of dispirocyclic compounds has been developed by the squaramide-catalysed asymmetric Michael addition/cyclization cascade reaction of 2,3-dioxopyrrolidines with 3-chlorooxindoles. The corresp
Squaramide-catalysed asymmetric Michael addition/cyclization cascade reaction of 4-arylmethylidene-2,3-dioxopyrrolidines with 2-isothiocyanato-1-indanones
Du, Da-Ming,Hou, Xi-Qiang,Wen, Jiang-Bo,Yan, Li
supporting information, p. 7181 - 7185 (2021/08/30)
A highly efficient cinchona alkaloid-derived squaramide catalysed asymmetric Michael/cyclization cascade reaction of 4-arylmethylidene-2,3-dioxopyrrolidines with 2-isothiocyanato-1-indanones was successfully developed. This protocol provides an efficient
Enantioselective Hetero-Diels-Alder Reaction and the Synthesis of Spiropyrrolidone Derivatives
Huang, Yekai,Li, Yanan,Sun, Jianan,Li, Jindong,Zha, Zhenggen,Wang, Zhiyong
, p. 8464 - 8472 (2018/07/21)
An efficient enantioselective hetero-Diels-Alder reaction was developed under catalysis of a chiral copper complex. A variety of spiropyrrolidones, which bear a tetra-substituted carbon stereocenter, can be obtained in good yields with excellent enantioselectivities by virtue of this method. Furthermore, a substrate-dependent reaction pathway was proposed on the basis of the isolated intermediates.
Pyrazolo-pyrrolo-pyrimidine-diones
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, (2008/06/13)
New pyrazolo-pyrrolo-pyrimidine-dione (PPPD) compounds of formula (I), STR1 where R1, R2, R3, R4 and m are as defined in the specification, e.g., 4-(benzoylmethyl)-6-cyclohexyl-6,7-dihydro-2-phenyl-4H-pyrazolo[1
