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73557-48-9

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73557-48-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73557-48-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,5,5 and 7 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 73557-48:
(7*7)+(6*3)+(5*5)+(4*5)+(3*7)+(2*4)+(1*8)=149
149 % 10 = 9
So 73557-48-9 is a valid CAS Registry Number.

73557-48-9Downstream Products

73557-48-9Relevant articles and documents

Gem-Difluoroallylation of Aldehydes and Ketones as a Convenient Route to α,α-Difluorohomoallylic Alcohols

Yang, Zhen-Yu,Burton, Donald J.

, p. 1037 - 1041 (2007/10/02)

In the presence of zinc, 3-bromo-3,3-difluoropropene or 3-iodo-1,1-difluoropropene reacted with carbonyl compounds to give the corresponding α,α-difluorohomoallylic alcohols in good yields at 0 deg C to room temperature.The reaction is applicable to aliph

gem-(DIFLUOROALLYL)LITHIUM: PREPARATION BY LITHIUM-HALOGEN EXCHANGE AND UTILIZATION IN ORGANOSILICON AND ORGANIC SYNTHESIS.

Seyferth,Simon,Sepelak,Klein

, p. 4634 - 4639 (2007/10/02)

gem-(Difluoroallyl)lithium may be generated by lithium-bromine exchange between n-butyllithium and CH//2 equals CHCF//2Br at minus 95 degree C by using an in situ procedure. When this preparation is carried out in the presence of chlorosilanes, aldehydes, ketones, and esters, products are formed, often in good yield. The factors determining the regioselectivity in addition to C equals O of unsymmetrically substituted allylic lithium reagents are discussed.

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