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877177-87-2

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877177-87-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 877177-87-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,7,1,7 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 877177-87:
(8*8)+(7*7)+(6*7)+(5*1)+(4*7)+(3*7)+(2*8)+(1*7)=232
232 % 10 = 2
So 877177-87-2 is a valid CAS Registry Number.

877177-87-2Relevant articles and documents

Enantioselective Synthesis of Isoflavanones and Pterocarpans through a RuII-Catalyzed ATH-DKR of Isoflavones

Caleffi, Guilherme S.,Costa, Paulo R. R.,Costa-Júnior, Paulo C. T.,Gaspar, Francisco V.

, p. 5097 - 5108 (2021/10/20)

Noyori-Ikariya RuII complexes promoted the one-pot C=C/C=O bonds reduction of isoflavones using sodium formate as the hydrogen source through Asymmetric Transfer Hydrogenation-Dynamic Kinetic Resolution (ATH-DKR). Due to the neutral conditions employed, isoflavones with different substituents at the 2’-position of B-ring (H, OH, OMe and Br) were successfully reduced. Ten cis-3-phenylchroman-4-ols were selectively obtained (>20 : 1 dr) in good yields (up to 86 %) and excellent enantioselectivities (up to >99 : 1 er). The synthetic applications of these chiral compounds were also demonstrated. Enantioenriched isoflavanones were obtained under mild metal-free oxidation of the cis-3-phenylchroman-4-ols while pterocarpans were synthesized by two strategies: an acid-catalyzed cyclization and a novel approach based on a Pd-catalyzed C?O intramolecular cross-coupling reaction.

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