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444588-09-4

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444588-09-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 444588-09-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,4,5,8 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 444588-09:
(8*4)+(7*4)+(6*4)+(5*5)+(4*8)+(3*8)+(2*0)+(1*9)=174
174 % 10 = 4
So 444588-09-4 is a valid CAS Registry Number.

444588-09-4Downstream Products

444588-09-4Relevant articles and documents

Gold Catalyzed Photoredox C1-Alkynylation of N-Alkyl-1,2,3,4- tetrahydroisoquinolines by 1-Bromoalkynes with UVA LED Light

Zhao, Yichao,Jin, Jianwen,Chan, Philip Wai Hong

, p. 1313 - 1321 (2019)

A synthetic method that combines [Au2(m-dppm)2]Cl2 (dppm=bis(diphenylphosphanyl)methane) and UVA LED (LED=light emitting diode) light (365 nm) to catalyze the regioselective C1-alkynylation of N-alkyl-1,2,3,4-tetrahydroisoquinolines (THIQs) with alkynyl bromides is described. The reaction mechanism was delineated to involve a reductive quench pathway to generate the two posited radical species of the nitrogen-containing heterocycle and organic halide. In contrast, radical formation via an oxidative quench pathway was suggested to be operative in analogous control experiments with a 1-iodoalkyne. The usefulness of this carbon-carbon bond forming strategy was also exemplified by its application to the formal synthesis of the opioid analgesic drug methopholine and synthesis of a protoberberine alkaloid derivative.

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