Tetrahydrofuran → [2-(Propan-2-ylamino)phenyl]methanol

A solution of 2,2,-dimethyl-1,4-dihydro-2H-benzo[1,3]oxazine (125 g, 0.77 mol) in THF (1 L) was filtered through a scintillation funnel and then added dropwise via an addition funnel, over a period of 2.5 h, to a stirred solution of 1.0 M LiAlH4 in THF (800 mL) at 0° C. The reaction was quenched by slow portionwise addition of Na2SO4.10H2O (110 g), over a period of 1.5 h, at 0° C. The reaction mixture was stirred overnight, filtered and the solid salts were washed thoroughly with THF. The filtrate was concentrated under reduced pressure to yield 2-isopropylaminophenylmethanol (120 g, 95%) as a yellow oil. 1H NMR (CDCl3; 300 MHz): 1.24 (d, 6H, CH(CH3)2), 3.15 (bs, 1H, OH), 3.61 (sept, 1H, CH(CH3)2), 4.57 (s, 2H, CH2), 6.59 (t, 1H, ArH), 6.65 (d, 1H, ArH), 6.99 (d, 1H, ArH), 7.15 (t, 1H, ArH).

1. customThe reaction was quenched by slow portionwise addition of Na2SO4.10H2O (110 g), over a period of 1.5 h, at 0° C
2. filtrationfiltered
3. washthe solid salts were washed thoroughly with THF
4. concentrationThe filtrate was concentrated under reduced pressure

ORDレコード

ord-c1f7208334ee45d28f383a3c0fd36aec

出典データセット

uspto-grants-2011_01

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07875629B2