成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

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 1-Boc-3-piperidone
98977-36-7

1-Boc-3-piperidone synthesis

8synthesis methods
With 179g compound 3(1-BOC-3-piperidines alcohol) drop in the 2L reaction flask, drop into pimelinketone 1300g, aluminum isopropylate 88g, methylene dichloride 400ml is warming up to 80 ℃, insulation reaction 8h, reaction finishes to be cooled to room temperature, adds 10% sodium hydroxide 200ml, stirring at normal temperature 30min, filter, the filtrate normal pressure reclaims methylene dichloride, reclaim under reduced pressure pimelinketone again, reclaim finish after, add the 300ml dichloromethane extraction three times, it is dry concentrated to merge oil reservoir, gets 1-BOC-3-piperidone crude product.
Refining: with 1-BOC-3-piperidone crude product is that 60pa, temperature are to distill under 104 ~ 105 ℃ the condition at pressure, gets 1-BOC-3-piperidone elaboration 163g, 92.9%.
85275-45-2 Synthesis
1-Boc-3-hydroxypiperidine

85275-45-2
380 suppliers
$7.00/5g

-

Yield:98977-36-7 99.4%

Reaction Conditions:

with sodium hypochlorite solution;sodium hydrogencarbonate;potassium bromide in dichloromethane at 5 - 10; pH=8.5;Reagent/catalyst;

Steps:

2.2 Preparation of N-BOC-3-piperidone

In the step 2, the compound N-BOC-3-piperidone is prepared according to the following scheme:To the reaction flask was added 20.1 g of N-BOC-3-hydroxypiperidine,703.5 mg of PS-ABNO,100 ml of dichloromethane,1g of potassium bromide dissolved in water was added to the reaction system,Cooled to 5 ° C with an ice bath,8.4 g of NaHCO3 was dissolved in 100 ml of sodium hypochlorite solution,Adjust its pH = 8.5 or so,Slowly added to control the drip rate so that the reaction temperature is not higher than 10 , after the addition was completed,TLC detection, the reaction was completed, the recovery of PS-ABNO filtration, the reaction liquid was separated and the aqueous phase was extracted with 100ml of dichloromethane, the organic phase was combined, washed once with 100ml of water, the organic phase was dried over anhydrous Na2SO4, filtered, Concentration of 19.8g of light yellow oily product, to obtain the target product N-BOC-3-piperidone, yield 99.4%

References:

CN107573278,2018,A Location in patent:Paragraph 0055; 0059-0061; 0076-0077

1-Boc-3-piperidone Related Search: