Diisopropylethylamine → HCID 66762641, compound

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Reaction Steps

To a solution of methyl 4,6-dichloroquinazoline-8-carboxylate (574 mg; 2.23 mmol; 1.00 eq.) in acetonenitrile (5 ml) containing N-ethyl-N-isopropylpropan-2-amine (0.80 ml; 4.47 mmol; 2.00 eq.) was added tert-butyl [3-(1-aminoethyl)phenyl]carbamate (543 mg; 2.30 mmol; 1.03 eq.), the reaction mixture was stirred at RT overnight. Concentrated to get 4-[1-(3-tert-butoxycarbonylamino-phenyl)-ethylamino]-6-chloro-quinazoline-8-carboxylic acid methyl ester. To this crude was added methanolic ammonia (3.19 ml; 7.00 M; 22.33 mmol; 10.00 eq.) and stirred at RT for 48 h. The solvent was removed and the residue, {3-[1-(8-Carbamoyl-6-chloro-quinazolin-4-ylamino)-ethyl]-phenyl}-carbamic acid tert-butyl ester was treated with 4.0M hydrogen chloride in dioxane (5.58 ml; 4.00 M; 22.33 mmol; 10.00 eq.) and methaonl (6.45 ml). Stirred overnight, concentrated and purified by HPLC to collect the title product (130 mg) in 14% over all yield. MS (M+1) 342.

Provenance & Evidence