3-[1-(5-Ethyl-thiophen-2-ylmethyl)-thioureido]-propionic acid tert-butyl ester → HCID 178436376, compound

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Reaction Steps

2-Bromo-1-(trans-4-tert-butyl-cyclohexyl)-ethanone (72 mg, 0.277 mmol) was added to a methanol (about 4 mL) solution of 3-[1-(5-ethyl-thiophen-2-ylmethyl)-thioureido]-propionic acid tert-butyl ester (100 mg, 0.304 mmol) to obtain 3-[[4-(trans-4-tert-butyl-cyclohexyl)-thiazol-2-yl]-(5-ethyl-thiophen-2-ylmethyl)-amino]-propionic acid tert-butyl ester (108 mg, 0.220 mmol) following a method analogous to General Procedure C (and similar to the procedure found in Example 5). Hydrolysis of this ester following a method analogous to General Procedure G1 using 1 N NaOH (aq) solution (2 mL), THF (1 mL) and MeOH (1 mL) gave 3-[[4-(trans-4-tert-butyl-cyclohexyl)-thiazol-2-yl]-(5-ethyl-thiophen-2-ylmethyl)-amino]-propionic acid (37 mg, 0.085 mmol). LC-MS m/z: 435 (M+1)+.

Provenance & Evidence