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443984-28-9

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443984-28-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 443984-28-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,3,9,8 and 4 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 443984-28:
(8*4)+(7*4)+(6*3)+(5*9)+(4*8)+(3*4)+(2*2)+(1*8)=179
179 % 10 = 9
So 443984-28-9 is a valid CAS Registry Number.

443984-28-9Downstream Products

443984-28-9Relevant articles and documents

4,4′-Disubstituted L-prolines as highly enantioselective catalysts for direct aldol reactions

Gu, Liuqun,Yu, Menglong,Wu, Xiaoyu,Zhang, Yazhu,Zhao, Gang

, p. 2223 - 2228 (2007/10/03)

A new series of 4,4′-disubstituted prolines (1a-h) has been developed and tested as organocatalysts in the direct catalytic asymmetric aldol reaction of several aliphatic ketones with aldehydes. Catalyst 1g affords the best enantioselectivities for this transformation. The reaction was carried out in DMF using a catalyst loading of 10 mol% at -10°C to give the aldol products in up to 97% ee for acetone. In the cases of cyclohexanone and cyclopentanone, the corresponding anti-products were obtained in 94% ee.

Heteroaryl-substituted pyrrole derivatives, their preparation and their therapeutic uses

-

Page 213, (2010/11/30)

Compounds having activity against production of an inflammatory cytokine of formula (I)′: 1A′ is pyrrole; R1′ is phenyl or naphthyl; R2′ is pyridyl or pyrimidinyl; R3′ is (IIa)′, (IIb)′ or (IIc)′: 2m′ is 1; E′ is nitrogen; D′ is >C(R5′)—, R5′ is hydrogen, Substituent α′ or Substituent β′; B′ is nitrogen-containing 5-membered heterocyclic; R4′ is 1 to 3 substituents from Substituent α′, Substituent β′ and Substituent γ′; R1′ and R3′ are bonded to two atoms of the pyrrole adjacent to the pyrrole atom bonded to R2′; Substituent α′ is hydroxyl, nitro, cyano, halogen, alkoxy, halogeno alkoxy, alkylthio, halogeno alkylthio or —NRa′Rb′; Ra′ and Rb′ are hydrogen, alkyl, alkenyl, alkynyl, aralkyl or alkylsulfonyl, or Ra′ and Rb′ with the nitrogen atom form a heterocyclyl; Substituent β′ is alkyl, alkenyl, alkynyl, aralkyl or cycloalkyl; Substituent γ′ is oxo, hydroxyimino, alkoxyimino, alkylene, alkylenedioxy, alkylsulfinyl, alkylsulfonyl, aryl, aryloxy, alkylidenyl or aralkylidenyl.

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