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488787-32-2

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488787-32-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 488787-32-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,8,8,7,8 and 7 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 488787-32:
(8*4)+(7*8)+(6*8)+(5*7)+(4*8)+(3*7)+(2*3)+(1*2)=232
232 % 10 = 2
So 488787-32-2 is a valid CAS Registry Number.

488787-32-2Downstream Products

488787-32-2Relevant articles and documents

Synthesis of tetrahydrocannabinols based on an indirect 1,4-addition strategy

William, Anthony D.,Kobayashi, Yuichi

, p. 8771 - 8782 (2002)

The synthetic procedure presented for the preparation of the title compounds requires 1,4-addition of bulky cuprates to cyclohexenones and subsequent reaction with electrophiles. However, the enolates generated by BF3·OEt2-assistance suffer from lack of nucleophilicity. To circumvent this problem, we developed an indirect method consisting of the following three steps: (1) iodination of the cyclohexenones at the α position; (2) BF3·OEt2-assisted 1,4-addition of cuprates (Ar2Cu(CN)-Li2, Ar = aryl) followed by quenching the enolates with water; (3) reaction of the α-iodo-β-arylcylohexanones thus formed with EtMgBr to generate magnesium enolates. The enolates thus generated in this way showed a high reactivity toward ClP(O)(OEt)2 to furnish enol phosphates. The aforementioned procedure was also applied to a synthesis of optically active Δ9-tetrahydrocannabinol. In addition, a naphthalene analogue of the latter compound was also synthesized in a similar way.

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