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51624-43-2

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51624-43-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51624-43-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,6,2 and 4 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 51624-43:
(7*5)+(6*1)+(5*6)+(4*2)+(3*4)+(2*4)+(1*3)=102
102 % 10 = 2
So 51624-43-2 is a valid CAS Registry Number.

51624-43-2Downstream Products

51624-43-2Relevant articles and documents

Controllable chemoselectivity in the coupling of bromoalkynes with alcohols under visible-light irradiation without additives: Synthesis of propargyl alcohols and α-ketoesters

Ni, Ke,Meng, Ling-Guo,Ruan, Hongjie,Wang, Lei

, p. 8438 - 8441 (2019/07/22)

The chemoselectivity of visible-light-induced coupling reactions of bromoalkynes with alcohols can be controlled by simple changes to the reaction atmosphere (N2 or O2). A N2 atmosphere favours propargyl alcohols via a direct C-C coupling process, whereas an O2 atmosphere results in the generation of α-ketoesters through the oxidative CC/C-O coupling pathway.

Gold-Catalyzed Cadiot–Chodkiewicz-type Cross-Coupling of Terminal Alkynes with Alkynyl Hypervalent Iodine Reagents: Highly Selective Synthesis of Unsymmetrical 1,3-Diynes

Li, Xiangdong,Xie, Xin,Sun, Ning,Liu, Yuanhong

supporting information, p. 6994 - 6998 (2017/06/08)

A new and efficient method for the synthesis of unsymmetrical 1,3-butadiynes by gold-catalyzed C(sp)–C(sp) cross-coupling of terminal alkynes with alkynyl hypervalent iodine(III) reagents has been developed. The reaction features high selectivity and efficiency, mild reaction conditions, wide substrate scope, and functional-group compatibility, and is a highly attractive complement to existing methods. Mechanistic studies reveal that formation of a phenanthrolinyl-ligated gold(I) complex is crucial for the efficiency and selectivity of the target transformation.

Visible-light-activated copper(i) catalyzed oxidative Csp-Csp cross-coupling reaction: Efficient synthesis of unsymmetrical conjugated diynes without ligands and base

Sagadevan, Arunachalam,Lyu, Ping-Chiang,Hwang, Kuo Chu

supporting information, p. 4526 - 4530 (2016/08/18)

A novel visible-light-promoted copper-catalysed process for the Csp-Csp cross-coupling reaction of terminal alkynes at room temperature is described. The current photochemical method is simple, highly functional group compatible, and more viable towards the construction of bio-active 1,3-unsymmetrical conjugated diynes without the need of bases/ligands, additives and expensive palladium/gold catalysts.

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