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133878-56-5

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133878-56-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133878-56-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,8,7 and 8 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 133878-56:
(8*1)+(7*3)+(6*3)+(5*8)+(4*7)+(3*8)+(2*5)+(1*6)=155
155 % 10 = 5
So 133878-56-5 is a valid CAS Registry Number.

133878-56-5Downstream Products

133878-56-5Relevant articles and documents

Synthesis and reactions of monosilylated 1,3,5-hexatriyne and 1,3,5,7-octatrayne. Total synthesis and caryoynencins

Yamaguchi,Park,Hirama,Torisu,Nakamura,Minami,Nishihara,Hiraoka

, p. 1717 - 1725 (2007/10/02)

Selective monodesilylation of 1,8-bis(t-butyldiphenylsilyl)-1,3,5,7-octatetrayne and 1,6-bis(t-butyldiphenylsilyl)-1,3,5-hexatriyne with lithiated phenylacetylene gave unstable 1-(t-butyldiphenylsilyl)-1,3,5,7-octatetrayne and 1-(t-butyldiphenylsilyl)-1,3,5-hexatriyne, respectively. The terminal acetylenes on lithiation added to aldehydes and a ketone giving polyynols in high yields. The reaction was applied to the synthesis of polyyne antibiotics, caryoynencins. Polymerization of the terminal octatetrayne on an ITO-coated glass plate gave a film, which showed conductivity of 10-4S cm-1 when doped with SO3.

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