3814-30-0, name is (Bromomethyl)cyclopentane, belongs to bromides-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Application In Synthesis of (Bromomethyl)cyclopentane
General procedure: Potassium carbonate (791 mg, 5.7 mmol) was added to a solution of 3-iodoindazole (700 mg, 2.9 mmol) and 2-chloroethyl methyl ether (406 mg, 4.3 mmol) in ACN (20 mL) at rt. The reaction was heated to reflux overnight, and then was filtered and concentrated. The residue was purified by silica gel chromatography (15%-50% EtOAc/hexanes) to give 530 mg (63%) of the title compound as a light yellow oil. The title compounds were prepared from 5-fluoro-3-iodo-indazole and (bromomethyl)cyclopentane according to the procedure for Preparation 10A. [0365] 1-(cyclopentylmethyl)-5-fluoro-3-iodo-1H-indazole (72%) was isolated as the major isomer eluting first. 1H NMR (400 MHz, CDCl3): delta 1.25-1.32 (2H, m), 1.50-1.65 (6H, m), 2.48-2.56 (1H, m), 4.27 (2H, d, J=7.5 Hz), 7.09 (1H, dd, J=8.3, 2.3 Hz), 7.18 (1H, td, J=8.9, 2.4 Hz), 7.32 (1H, dd, J=9.1, 4.0 Hz). [M+H] calc’d for C13H14FIN2, 345. found 345. [0366] 2-(cyclopentylmethyl)-5-fluoro-3-iodo-2H-indazole (18%) was isolated as the minor isomer eluting second. 1H NMR (400 MHz, CDCl3): delta 1.33-1.42 (2H, m), 1.56-1.73 (6H, m), 2.62-2.70 (1H, m), 4.41 (2H, d, J=7.6 Hz), 7.00 (1H, dd, J=8.8, 2.4 Hz), 7.09 (1H, td, J=9.2, 2.4 Hz), 7.65 (1H, dd, J=9.3, 4.5 Hz). [M+H] calc’d for C13H14FIN2, 345. found 345.
The synthetic route of 3814-30-0 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Quanticel Pharmaceuticals, Inc.; Kanouni, Toufike; Stafford, Jeffrey Alan; Veal, James Marvin; Wallace, Michael Brennen; US2014/171432; (2014); A1;,
Bromide – Wikipedia,
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