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91444-16-5

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91444-16-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91444-16-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,4,4 and 4 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 91444-16:
(7*9)+(6*1)+(5*4)+(4*4)+(3*4)+(2*1)+(1*6)=125
125 % 10 = 5
So 91444-16-5 is a valid CAS Registry Number.

91444-16-5Relevant articles and documents

Divergent and Orthogonal Approach to Carbazoles and Pyridoindoles from Oxindoles via Indole Intermediates

Mandal, Tirtha,Chakraborti, Gargi,Karmakar, Shilpi,Dash, Jyotirmayee

supporting information, p. 4759 - 4763 (2018/08/24)

The previously unexplored Grignard addition to oxindoles provides a regiospecific approach to 2- and 2,3-disubstituted indole derivatives in high yields via a one-pot aromatization driven dehydration pathway. This method allows a convenient preparation of diallyl indoles that are used as ring-closing metathesis (RCM) precursors for the orthogonal synthesis of pyrido[1,2-a]indoles and carbazoles. The synthetic utility of this method is illustrated by the synthesis of a microtubulin inhibitor and naturally occurring carbazole alkaloids.

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