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187040-04-6

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187040-04-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 187040-04-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,7,0,4 and 0 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 187040-04:
(8*1)+(7*8)+(6*7)+(5*0)+(4*4)+(3*0)+(2*0)+(1*4)=126
126 % 10 = 6
So 187040-04-6 is a valid CAS Registry Number.

187040-04-6Downstream Products

187040-04-6Relevant articles and documents

Sporolide B: Synthetic studies

Gladding, Jeffery A.,Bacci, James P.,Shaw, Scott A.,Smith III, Amos B.

scheme or table, p. 6697 - 6706 (2011/10/01)

Studies directed toward the synthesis of the architecturally complex marine natural product sporolide B are described. Synthetic analysis suggested advanced hydroquinone and benzodiquinane fragments, which upon elaboration were successfully united via an

Synthetic approaches toward ecteinascidins. Part 1. Preparation of an (E)-2-arylidene-3-benzyl-1,5-imino-3-benzazocin-4-one having a protected phenol in the E-ring

Saito, Naoki,Tashiro, Kyoichi,Maru, Yukie,Yamaguchi, Kentaro,Kubo, Akinori

, p. 53 - 70 (2007/10/03)

A synthetic strategy for the preparation of ecteinascidins isolated from the Caribbean tunicate Ecteinascidia turbinata and an efficient synthesis of a key tricyclic lactam intermediate 32 are described.The key step is the intramolecular cyclization of the allylic alcohol 15 to the (E)-1,5-imino-3-benzazocine 16.Cyclization of 15 (R = Me, Bn) afforded the desired product 16 in good yield.However, treatment of 15 (R = MOM) under acidic conditions gave compound 18 in high yield, the structure of which was determined by X-ray crystallography.Finally, 16 was converted into (E)-N-methyltricyclic lactam 32 that can serve as a synthetic precursor of ecteinascidins.

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