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78469-76-8

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78469-76-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 78469-76-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,4,6 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 78469-76:
(7*7)+(6*8)+(5*4)+(4*6)+(3*9)+(2*7)+(1*6)=188
188 % 10 = 8
So 78469-76-8 is a valid CAS Registry Number.

78469-76-8Relevant articles and documents

Total synthesis of (+)-colletodiol from (S,S)-tartrate and (R)-3-hydroxybutanoate

Schnurrenberger, Peter,Hungerbuehler, Ernst,Seebach, Dieter

, p. 733 - 744 (2007/10/02)

The macrodiolide antibiotic (+)-colletodiol (7, Scheme 1) was synthesised.The configuration was thus proven to be (6R,11R,12R,14R). - Key intermediates (Schemes 9 and 10) are the two hydroxy acids 43 and 64, which were prepared from dimethyl (S,S)-tartrate in 20percent overall yield (12 steps) and from (R)-3-hydroxybutanoate in 57percent overall yield (6 steps), respectively.The two hydroxy acids were cyclised to give, after deprotection, the title compound. - Our investigations led to the production of a large number of chiral building blocks, many of them in different stereoisomeric forms.

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