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77333-91-6

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77333-91-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77333-91-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,3,3 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77333-91:
(7*7)+(6*7)+(5*3)+(4*3)+(3*3)+(2*9)+(1*1)=146
146 % 10 = 6
So 77333-91-6 is a valid CAS Registry Number.

77333-91-6Downstream Products

77333-91-6Relevant articles and documents

Syntheses of the (+/-)--Gingerols (Pungent Principles of Ginger) and Related Compounds through Regioselective Aldol Condensations: Relative Pungency Assays

Dennif, Phillip,Macleod, Ian,Whiting, Donald A.

, p. 82 - 87 (2007/10/02)

The deprotonation of trimethylsilylzingerone (13) by lithium di-isopropylamide at -78 deg C has been found to be regioselective (92 : 8 in favour of less-substituted enolate): the anion was condensed with alkanals and acyl imidazoles to give convenient syntheses of (+/-)--- and --gingerols (1) and -, -, and -gingerdiones (9).Similary, 3-methoxy-4-trimethylsilyloxybenzylideneacetone (17) gave the (+/-)---dehydrogingerols (8) and -, -, and -dehydrogingerdiones (10).The aldol reaction to -gingerol and methyl -gingerol was also conducted through a vinyloxyborane or through the enol silyl ether (TiCl4 catalysis).Results of organoleptic assays on these compounds are discussed, and the relation between pungency in the gingerols and in capsaicin is commented on.The aldol method was also used to synthesise the natural β-ketols(+/-)-daphneolone (25) and (+/-)-hexahydrocurcumin (4).

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