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134699-74-4

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134699-74-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134699-74-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,6,9 and 9 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 134699-74:
(8*1)+(7*3)+(6*4)+(5*6)+(4*9)+(3*9)+(2*7)+(1*4)=164
164 % 10 = 4
So 134699-74-4 is a valid CAS Registry Number.

134699-74-4Relevant articles and documents

Iridium-Catalyzed Asymmetric Hydrogenation of Sterically Hindered Cyclic Imines for Enantioselective Synthesis of Tetrahydroisoquinolines

Li, Bin,Liu, Ruixia,Yang, Jing,Luo, Jingyuan,Yao, Lin,Li, Muqiong,Zheng, Xiaohui,Jiang, Ru,Nie, Huifang,Zhang, Shengyong

supporting information, p. 140 - 144 (2021/01/13)

An efficient enantioselective hydrogenation of sterically hindered cyclic imines catalyzed by the Ir-tBu-ax-Josiphos complex has been described, producing a series of useful chiral bulky tetrahydroisoquinoline analogs in high isolated yields (85-96%) with good to excellent enantioselectivities (74-99% ee). This transformation provided highly straightforward access to the useful derivatives of tetrahydroisoquinolines, which are of great potential value in drug molecule and natural product research.

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