天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

502931-34-2

Isopropyl 4-aminopiperidine-1-carboxylate synthesis

2synthesis methods
isopropyl 4-(tert-butoxycarbonylamino)piperidine-1-carboxylate

902143-82-2
1 suppliers
inquiry

Isopropyl 4-aminopiperidine-1-carboxylate

502931-34-2
13 suppliers
inquiry

-

Yield:502931-34-2 89%

Reaction Conditions:

with trifluoroacetic acid in dichloromethane at 20; for 2 h;

Steps:

18.B

To a solution of 18a (3.26 g, 11.37 mmol) in 10 mL of DCM, was added TFA (5 mL, 64.9 mmol). The mixture was stirred at room temperature for 2h and the solvent were evaporated. The residue was dissolved in DCM and a saturated solution of NaHCOs and IN NaOH were added until pH was 8. The layers were separated and the aqueous layer was extracted with 3:1 DCM:IPA (3 x 40 mL). The organic extracts were combined, dried, filtered and evaporated to afford 1.89 g (89%) of 18b.

References:

WO2010/149685,2010,A1 Location in patent:Page/Page column 50

Isopropyl 4-aminopiperidine-1-carboxylate Related Search: