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856899-98-4

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856899-98-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 856899-98-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,6,8,9 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 856899-98:
(8*8)+(7*5)+(6*6)+(5*8)+(4*9)+(3*9)+(2*9)+(1*8)=264
264 % 10 = 4
So 856899-98-4 is a valid CAS Registry Number.

856899-98-4Relevant articles and documents

Asymmetric transfer hydrogenation of α-azido acrylates

Ji, Yang,Xue, Ping,Ma, Dan-Dan,Li, Xue-Qiang,Gu, Peiming,Li, Rui

supporting information, p. 192 - 194 (2015/02/05)

The asymmetric transfer hydrogenation of α-azido acrylates has been explored, a range of α-hydroxy esters are produced with good enantioselectivities (80-90% ee). The reaction was conducted in the wet HCO2H/NEt3 with Ru-TsDPEN A.

Synthesis of unit-B of cryptophycin-24 via Sharpless asymmetric dihydroxylation

Borah, Arun Jyoti,Goswami, Progyashree,Barua, Nabin C.,Phukan, Prodeep

supporting information, p. 7128 - 7130 (2013/01/15)

A synthetic pathway for the synthesis of unit-B of cryptophycin-24 has been developed using Sharpless asymmetric dihydroxylation as the key step. This study shows that direct azidation of α-hydroxy acid ester using diphenylphosphoryl azide is beneficial to asymmetric synthesis of α-amino acid without the loss of chirality during the transformation.

Unusual migrations and cyclization in the preparation of β-azido alcohols from β-hydroxy esters

Madhusudhan,Om Reddy,Ramanatham,Dubey

, p. 2719 - 2723 (2007/10/03)

Migration of TBDMS and Boc groups from 2° alcohols to 1° alcohols during the reduction of β-hydroxy esters has been observed. Also, unusual cyclization has been noticed during tosylation of benzylic alcohol in tert-butyl ((2R)-2-hydroxy-2-phenyl ethyl)car

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