Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 67622-86-0, name is 2-Methyl-1-(methylamino)propan-2-ol. A new synthetic method of this compound is introduced below., Safety of 2-Methyl-1-(methylamino)propan-2-ol
General procedure: The solution of boronic acid 4 (9.4 mg, 0.025 mmol, 5 mol%) and aminoalcohol (5.2 mg, 0.025 mmol, 5 mol%) was refluxed in toluene for12 h to remove water azeotropically. The mixture was allowed to coolto r.t. and toluene was removed in vacuo. Next, 1 M SnCl4 in CH2Cl2(25 muL, 0.025 mmol, 5 mol%) was added to a solution of the oxazaborolidine,methacrolein (43 muL, 0.5 mmol, 1 equiv), and cyclopentadiene(125 muL, 1.5 mmol, 3 equiv) in CH2Cl2 (2.5 mL) and the mixturewas stirred for 2 h at -78 C. The reaction was quenched with sat. aqNaHCO3 and extracted with Et2O. The combined organic phase waswashed with brine, and dried (Na2SO4). After filtration and removal ofsolvent, the crude product was purified by column chromatography(silica gel, pentane/Et2O 9:1) to afford the Diels-Alder adduct (67 mg,98%) as a colorless oil. The enantioselectivity was determined to be84% ee by GC analysis after conversion into the chiral acetal by(2R,4R)-pentane-2,4-diol.GC [ULBON HR-20M (PEG-20M), 100 C]: tR = 24.3 (minor), 26.0 min(major).1H NMR (400 MHz, CDCl3): delta = 9.70 (s, 1 H), 6.31 (dd, J = 2.9, 6.1 Hz, 1H), 6.11 (dd, J = 6.1, 3.0 Hz, 1 H), 2.87 (br s, 1 H), 2.81 (br s, 1 H), 2.22(dd, J = 3.8, 12.0 Hz, 1 H), 1.35-1.42 (m, 1 H), 1.22-1.28 (m, 1 H), 1.00(s, 3 H).
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Reference:
Article; Shimoda, Yasushi; Yamamoto, Hisashi; Synthesis; vol. 49; 1; (2017); p. 175 – 180;,
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