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!

ChemicalBook CAS DataBase List N-Formylpiperidine
2591-86-8

N-Formylpiperidine synthesis

12synthesis methods
-

Yield:2591-86-8 100%

Reaction Conditions:

with cyano-hydroxyimino-acetic acid 2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester;sodium hydrogencarbonate;1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride in water at 20; for 3 h;Reagent/catalyst;Solvent;

Steps:

General procedure for N-formylations
General procedure: To a solution of amine (1 equiv), formic acid (5 equiv), sodium bicarbonate (10 equiv), and glyceroacetonide-Oxyma 1 (2 equiv) in H2O (0.2-0.3 M) solution was added EDCI (2 equiv) The reaction mixture was stirred for 3 h and quenched with 1% aq HCl. The aqueous phase was extracted with EtOAc (or CHCl3 or CHCl3-MeOH (10/1). The combined organic extracts were dried over Na2SO4 and evaporated in vacuo. Purification by a silica gel chromatography (or sephadex LH20) afforded the desired compound (yields were given in Table 1). Similarly, N-formylations were performed with Oxyma 1 in DMF-H2O (9/1).

References:

Aleiwi, Bilal A.;Mitachi, Katsuhiko;Kurosu, Michio [Tetrahedron Letters,2013,vol. 54,# 16,p. 2077 - 2081]

FullText

N-Formylpiperidine Related Search: