Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 146307-51-9, name is trans-Methyl 4-((tert-butoxycarbonyl)amino)cyclohexanecarboxylate, This compound has unique chemical properties. The synthetic route is as follows., category: esters-buliding-blocks
To a solution of (frans)-methyl 4-((tert-butoxycarbonyl)amino)cyclohexanecarboxylate (Intermediate 18A) (1 .5 g, 5.8 mmol) in EtOH (24 mL) and THF (2.7 mL), cooled on ice, was added calcium chloride (1 .29 g, 1 1 .7 mmol) portion wise to give a milky suspension. NaBH4 (882 mg, 23.3 mmol) was then added portion wise over ca. 25 min and the reaction was stirred on ice for 1 h. The bath was removed and the mixture was allowed to stir at room temperature overnight. The reaction was cooled to 10 C and to this was added 5% aqueous K2CO3 (5.4 mL) dropwise, to give a pH of ca. 1 1 . A white precipitate formed and was isolated by filtration. The solid was stirred with EtOAc (50 mL) and water (14 mL). The layers were separated and the organic layer was washed with 0.5 M aqueous HCI (5 mL), water and brine, dried over MgS04, filtered, and concentrated to give the title compound (474 mg) as a white solid. The initial filtrate was concentrated, then dilute with saturated aqueous NH4CI and extracted with EtOAc (3X). Combined organics were washed with brine and dried over Na2SC>4, filtered, and concentrated to give the title compound (724 mg) as a white solid. Total isolated product was 1 .1 9 g (89% yield). 1H NMR (400 MHz, CD3SOCD3) delta 0.78-0.93 (m, 2 H), 1 .01 -1 .15 (m, 2 H), 1 .35 (s, 9 H), 1 .64-1 .80 (m, 4 H), 3.10 (d, J = 8 Hz, 1 H), 3.16 (t, J = 6 Hz, 2 H), 4.33 (t, J = 5 Hz, 1 H), 6.64 (d, J = 8 Hz, 1 H).
According to the analysis of related databases, 146307-51-9, the application of this compound in the production field has become more and more popular.
Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; DEATON, David Norman; GUO, Yu; HANCOCK, Ashley Paul; SCHULTE, Christie; SHEARER, Barry George; SMITH, Emilie Despagnet; STEWART, Eugene L.; THOMSON, Stephen Andrew; (556 pag.)WO2018/69863; (2018); A1;,
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