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133077-43-7

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133077-43-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133077-43-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,0,7 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 133077-43:
(8*1)+(7*3)+(6*3)+(5*0)+(4*7)+(3*7)+(2*4)+(1*3)=107
107 % 10 = 7
So 133077-43-7 is a valid CAS Registry Number.

133077-43-7Relevant articles and documents

Facile access to chiral 4-substituted chromanes through Rh-catalyzed asymmetric hydrogenation

Tao, Lin,Zhao, Qingyang,Zhang, Xumu,Dong, Xiu-Qin

supporting information, p. 1859 - 1862 (2020/01/21)

Rh/ZhaoPhos-catalyzed asymmetric hydrogenation of a series of (E)-2-(chroman-4-ylidene)acetates was successfully developed to prepare various chiral 4-substituted chromanes with high yields and excellent enantioselectivities (up to 99percent yield, 98percent ee). Moreover, the gram-scale hydrogenation could be performed well in the presence of 0.02 molpercent catalyst loading (TON = 5000), the hydrogenation product was easily converted to access other important compounds, which demonstrated the synthetic utility of this asymmetric catalytic methodology.

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