202522-03-0

Basic information

• Product Name: 3-Ethyl-4-(hydroxyMethyl)benzonitrile
• Synonyms: 3-Ethyl-4-(hydroxyMethyl)benzonitrile
• CAS NO: 202522-03-0
• Molecular Formula: C₁₀H₁₁NO
• Molecular Weight: 161.20044
• Mol File: 202522-03-0.mol

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 3-Ethyl-4-(hydroxyMethyl)benzonitrile(CAS DataBase Reference)
• NIST Chemistry Reference: 3-Ethyl-4-(hydroxyMethyl)benzonitrile(202522-03-0)
• EPA Substance Registry System: 3-Ethyl-4-(hydroxyMethyl)benzonitrile(202522-03-0)

Safety Data

• Hazardous Substances Data: 202522-03-0(Hazardous Substances Data)

Upstream product

• 202522-04-1 3-ethyl-4-formylbenzonitrile 
• 170230-87-2 4'-amino-3'-ethylbenzonitrile 

Downstream Products

• 202522-06-3 N-(4-cyano-2-ethylbenzyl)phthalimide 
• 202522-07-4 4-cyano-2-ethylbenzylamine 

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Design and SAR of novel potassium channel openers targeted for urge urinary incontinence. 2. Selective and potent benzylamino cyclobutenediones

A novel series of benzylamine, potassium channel openers (KCOs) is presented as part of our program toward designing new, bladder-selective compounds for the treatment of urge urinary incontinence (UUI). We have found that the in vitro potency of (R)-4-[3,4-dioxo-2-(1,2,2-trimethyl- propylamino)-cyclobut-1-enylamino]-3-ethyl-benzonitrile 1 in the relaxation of precontracted rat detrusor strips can also be obtained with cyanobenzylamine derivative 4 (IC50 = 0.29 μM) (Figure 3). Addition of a 2-Cl substituted benzylamine moiety and changing the alkylamino substituent of 4 to a t-Bu amine gives 31 (IC50 = 0.14 μM) - a compound with similar in vitro potency as 4 as well as relaxant activity on bladder smooth muscle in vivo when administered orally (31, ED50 = 3 mg/kg) in a rodent model of bladder instability. Further modifications, particularly the replacement of the t-Bu amino substituent with a tert-amylamine, gave a similarly active compound 60 (IC50 = 0.10 μM) which shows excellent in vivo efficacy (ED50 = 0.6 mg/kg). Moreover, 60, 3-(2,4-dichloro-6-methyl-benzylamino)-4- (1,1-dimethylpropylamino)-cyclobut-3-ene-1,2-dione (WAY-151616), shows excellent tissue selectivity for bladder K channels over arterial tissue (60, MAP ED20 = 100 mg/kg; selectivity: MAP ED20/bladder ED50 = 166). Other manipulations of the benzylamino cyclobutenediones, acylation of the benzylamine, conversion of the benzylamine substituent to a benzamide, homologation of the benzylamine to a phenethylamine, and incorporation of a methyl group at the benzyl carbon, all led to substantial loss of in vitro activity, although some in vivo activity was maintained in the acylated analogues. Compound 60 represents an attractive candidate for development in the treatment of UUI.