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65538-23-0

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65538-23-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 65538-23-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,5,3 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 65538-23:
(7*6)+(6*5)+(5*5)+(4*3)+(3*8)+(2*2)+(1*3)=140
140 % 10 = 0
So 65538-23-0 is a valid CAS Registry Number.

65538-23-0Relevant articles and documents

1-substituted 4-arylpiperazine as kappa opioid receptor antagonists

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Page/Page column 27, (2016/12/26)

Provided are compounds represented by the formula: where R, Y3, R1, R2, R3, R4, R6, G, R7, E1, E2, A, B, W, X, Y and Z are as defined herein.

Discovery of N-{4-[(3-hydroxyphenyl)-3-methylpiperazin-1-yl]methyl-2- methylpropyl}-4-phenoxybenzamide analogues as selective kappa opioid receptor antagonists

Kormos, Chad M.,Jin, Chunyang,Cueva, Juan Pablo,Runyon, Scott P.,Thomas, James B.,Brieaddy, Lawrence E.,Mascarella, S. Wayne,Navarro, Hernán A.,Gilmour, Brian P.,Carroll, F. Ivy

, p. 4551 - 4567 (2013/07/19)

There is continuing interest in the discovery and development of new κ opioid receptor antagonists. We recently reported that N-substituted 3-methyl-4-(3-hydroxyphenyl)piperazines were a new class of opioid receptor antagonists. In this study, we report the syntheses of two piperazine JDTic-like analogues. Evaluation of the two compounds in an in vitro [35S] GTPγS binding assay showed that neither compound showed the high potency and κ opioid receptor selectivity of JDTic. A library of compounds using the core scaffold 21 was synthesized and tested for their ability to inhibit [35S]GTPγS binding stimulated by the selective κ opioid agonist U69,593. These studies led to N-[(1S)-1-{[(3S)-4-(3-hydroxyphenyl)-3- methylpiperazin-1-yl]methyl}-2-methylpropyl]-4-phenoxybenzamide (11a), a compound that showed good κ opioid receptor antagonist properties. An SAR study based on 11a provided 28 novel analogues. Evaluation of these 28 compounds in the [35S]GTPγS binding assay showed that several of the analogues were potent and selective κ opioid receptor antagonists.

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