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124603-99-2

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124603-99-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 124603-99-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,4,6,0 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 124603-99:
(8*1)+(7*2)+(6*4)+(5*6)+(4*0)+(3*3)+(2*9)+(1*9)=112
112 % 10 = 2
So 124603-99-2 is a valid CAS Registry Number.

124603-99-2Upstream product

124603-99-2Relevant articles and documents

Total Synthesis of (+)-Phyllanthocin. Introduction of Intramolecular Hydroformylation for Complex Molecule Functionalization

Burke, Steven D.,Cobb, Jeffery E.,Takeuchi, Kumiko

, p. 2138 - 2151 (2007/10/02)

A 17-step total synthesis of (+)-phyllanthocin (1a) is described.Application of Sharpless'asymetric epoxidation reaction provided access to the diastereo- and enantiomerically pure epoxy ketone 9, a partner in crossed aldol construction.A notably rapid and high-yielding spiroketal equilibration leading to the tetracyclic intermediate 2 was effected with HF in acetonitrile.A Rh(I)-catalyzed hydroformylation was used to introduce the C3 functionality.Studies of intramolecular delivery of the rhodium nucleus to the concave face of the C3-C4 olefin led to a substantial improvement in yield and regioselectivity over the intermolecular version.

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