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289666-94-0

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289666-94-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 289666-94-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,9,6,6 and 6 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 289666-94:
(8*2)+(7*8)+(6*9)+(5*6)+(4*6)+(3*6)+(2*9)+(1*4)=220
220 % 10 = 0
So 289666-94-0 is a valid CAS Registry Number.

289666-94-0Downstream Products

289666-94-0Relevant articles and documents

Convergent total synthesis of (+)-mycalamide A

Kagawa, Natsuko,Ihara, Masataka,Toyota, Masahiro

, p. 6796 - 6805 (2007/10/03)

The details of a convergent total synthesis of (+)-mycalamide A are descri7bed. Yb(OTf)3-TMSCl-catalyzed cross-aldol reaction conditions are used to synthesize the right segment of mycalamide A. In this reaction, an acid-sensitive aldehyde reacts with methyl trimethylsilyl dimethylketene acetal without epimerization to provide the desired aldol adduct. Additionally, a tetrahydropyran ring, which is the left segment of mycalamide A, is prepared using a novel one-pot δ-lactone formation methodology. Both segments are constructed from a common starting material, D-mannitol. These segments are then coupled in the presence of BuLi, and the functional groups are transformed to complete the synthesis of (+)-mycalamide A.

A stereoselective synthesis of the C-10 to C-18 (right-half) fragment of mycalamides employing lewis acid promoted intermolecular aldol reaction.

Toyota,Hirota,Hirano,Ihara

, p. 2031 - 2034 (2007/10/03)

[reaction: see text] Beginning with D-mannitol, a stereoselective synthesis of the right-half segment of the mycalamides has been accomplished by employing Lewis acid catalyzed intermolecular aldol reaction and oxypalladation as the key steps.

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