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77855-71-1

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77855-71-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77855-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,5 and 5 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77855-71:
(7*7)+(6*7)+(5*8)+(4*5)+(3*5)+(2*7)+(1*1)=181
181 % 10 = 1
So 77855-71-1 is a valid CAS Registry Number.

77855-71-1Relevant articles and documents

The palladium-catalyzed addition of organoboronic acids to alkynes

Oh, Chang Ho,Jung, Hyung Hoon,Kim, Ki Seong,Kim, Nakjoong

, p. 805 - 808 (2003)

No base is necessary: Excellent yields are produced on addition of organoboronic acids to alkynes under mild reaction conditions when palladium compounds are used as catalysts (see scheme). Unlike the Suzuki-type cross-coupling reaction, the current reaction occurs in an acidic medium.

Gold-catalyzed isomerization of unactivated allenes into 1,3-dienes under ambient conditions

Ting, Chun-Ming,Hsu, Yi-Ling,Liu, Rai-Shung

, p. 6577 - 6579 (2012/07/31)

We have developed a gold-catalyzed isomerization of unactivated allenes into 1,3-dienes with nitrosobenzene as an additive. This reaction proceeded almost exclusively at room temperature for highly substituted allenes. The utility of this reaction is manifested by the development of one-pot [4+2]-cycloaddition of allenes and reactive alkenes.

REGIOSELECTIVE ALKYLATION OF 3-SUBSTITUTED 3-SULFOLENES

Takayama, Hiroaki,Suzuki, Hiromasa,Nomoto, Takashi,Yamada, Sachiko

, p. 303 - 306 (2007/10/02)

Remarkable directing effect of the substituent on the double bond of 3-sulfolene was found in the reaction with alkyl iodides under basic conditions; electron donating groups effect selective substitution at the 2-position while electron withdrawing group

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