Dichloromethane → HCID 68577174, Verbindung

Sodium triacetoxyborohydride (0:30 g, 1.42 mmol) is added to a stirred solution of 4-(3-methyl-butylamino)-piperidine-1-carboxylic acid tert-butyl ester (0.19 g, 0.71 mmol), 2-thiazolecarboxaldehyde (0.12 ml, 1.42 mmol), and dichloromethane (3.5 ml). The reaction is stirred overnight at room temperature under nitrogen. The reaction is diluted with ethyl acetate, washed with aqueous saturated NaHCO3, dried over Na2SO4, filtered, and concentrated. Water is added to the residue, and the solution loaded onto a SCX-2 (10 g) column and washed with water (20 ml) and methanol (20 ml). The product is then eluted with 2M ammonia in methanol (30 ml). The filtrate is concentrated and the crude material purified on silica gel eluting with 0-50% ethyl acetate/hexanes to yield (0.20 g) of 4-{(3-methyl-butyl)-[(thiazol-2-yl)-methyl]-amino}-piperidine-1-carboxylic acid tert-butyl ester: mass spectrum (ion spray): m/z=368 (M+1); 1H NMR (CDCl3): δ=7.67 (1H, d), 7.23 (1H, d), 4.17 (2H, brs), 3.93 (2H, s), 2.72-2.54 (5H, m), 1.78 (2H, brd), 1.7-1.57 (2H, m), 1.45-1.41 (10H, m), 1.40-1.32 (2H, m), 0.87 (6H, d).

1. washwashed with aqueous saturated NaHCO3
2. dry with materialdried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated
5. additionWater is added to the residue
6. washwashed with water (20 ml) and methanol (20 ml)
7. washThe product is then eluted with 2M ammonia in methanol (30 ml)
8. concentrationThe filtrate is concentrated
9. customthe crude material purified on silica gel eluting with 0-50% ethyl acetate/hexanes

ORD-Eintrag

ord-2364e6dd9aff4992a6dd5bb2aaf0d10a

Quelldatensatz

uspto-grants-2009_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07521462B2