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1603898-81-2

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1603898-81-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1603898-81-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,3,8,9 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1603898-81:
(9*1)+(8*6)+(7*0)+(6*3)+(5*8)+(4*9)+(3*8)+(2*8)+(1*1)=192
192 % 10 = 2
So 1603898-81-2 is a valid CAS Registry Number.

1603898-81-2Downstream Products

1603898-81-2Relevant academic research and scientific papers

Directed ortho metalation strategies. Effective regioselective routes to 1,2-, 2,3-, and 1,2,3-substituted naphthalenes

Groom, Katherine,Hussain, S. M. Shakil,Morin, Justin,Nilewski, Christian,Rantanen, Toni,Snieckus, Victor

supporting information, p. 2378 - 2381 (2014/05/20)

The regioselective synthesis of 2,3-di- and 1,2,3-trisubstituted naphthalenes via Directed ortho Metalation (DoM) strategies of N,N-diethyl-O-naphthyl-2-carbamate (1) is presented. Sequential LiTMP metalation-electrophile quench and s-BuLi/TMEDA (or t-BuLi)-electrophile quench of naphthyl-2-carbamate 1 provides a general route to contiguously substituted naphthalenes (6) with full regioselectivity. Further derivatization via ipso-halodesilylation and Suzuki-Miyaura cross-coupling leads ultimately to substituted halonaphthalenes and benzonaphthopyranones (9).

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