Chemical properties: 

Crystallization from ethyl acetate - methanol (10:1), melting point 147 ~ 149℃; Crystallization from hexan-ethyl acetate, melting point 151 ~ 152℃Chemicalbook; It is also reported to be a white crystalline solid with a melting point of 161 ° C. pKa7.0, 9.0, 9.6. Distribution coefficient (Ph=7.4) : 0.96.

Production method: 

1.5g(8mmo1) N-methyl-4-nitrophenethylamine (I) and 1.55g(7.7mmo1)2-[4-nitrophenoxy] ebromine (II) were dissolved in 50ml acetonitrile, 1.25g potassium carbonate and 1.2g sodium iodide were added, and stirred back for 72h. As for concentration, the remaining oily solids were divided between 100ml2mol/L sodium bicarbonate aqueous solution and 100ml ethyl acetate. 

The water layer was then extracted with 50ml ethyl acetate for two times, the ethyl acetate layer was combined, washed with saturated sodium chloride aqueous solution, and anhydrous magnesium sulfate was dried, filtered and concentrated. 

The 1.7g compound (Ⅲ) was obtained by ethanol crystallization with yield of 64% and melting point of 74℃. Compound (Ⅲ)(1.5g, 4.5mmo1) was dissolved in 100ml ethanol, catalyzed by Raney nickel and stirred at room temperature for 16h at 0.303MPa hydrogen pressure. Strain and concentrate the filtrate until dry. The remaining oil is dissolved in ether, filtered, and concentrated. Then, 0.90g compound (Ⅳ) was obtained by recrystallization with 1:1 ethyl acetate and petroleum ether mixture (60-80 ℃) with yield of 72% and melting point of 73-74 ℃. Compound (Ⅳ)(0.75g, 2.6mmo1) and mesylate anhydride (1.0g, 4mmo1) were dissolved in 50ml dry dichloromethane and stirred overnight at room temperature. 

The remaining oil was divided between 50ml2mol/L sodium bicarbonate aqueous solution and 50ml ethyl acetate. The water layer was then extracted with ethyl acetate (2×25m1), the ethyl acetate layer was combined, and the anhydrous magnesium sulfate was dried, filtered, and concentrated. The remaining solid was crystallized with ethyl acetate and methanol (10:1) to obtain 0.6g dofilide with a yield of 51% and a melting point of 147 ~ 149℃.

Our advantages:

1) Timely communication, reply within 12 hours.You can leave any messages on our whatsapp or send email to us.

2)Selecting raw materials strictly,our products are the highest purity.

3)Reasonable and competitive price.

4) Free sample for your evaluation.Customers only need to undertake the shipping fee for delivery the samples to your destionation.

5)OEM/ODM Available.Trial order is available for testing after samples.

6) Packaging can be customized according to each buyers' special request.

We guarantee that your package will pass 100% through the Mexico US, UK, Australia, Netherlands, Canada, France, Germany, Spain, Belgium, Sweden, Poland, Russian, Ukraine, Kazakhstan, Czech Republic, Slovakia, Portugal.

We have freight forwarders in these countries, and our customs clearance company will clear your parcels without any customs issues, sometimes even 1000 kg. Door to door service. Make sure you receive 100% of the goods. Let you have a good experience of our strong freight capacity.

Company Introduction

  hebei yanxi chemical  co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and development production of reagent tens of thousands of species. our aim is quality strives for the survival. Seek development by credit reputation. Our products have big price advantage in Europe South America and so on .and Our company also has the advantage of high quality in Africa. in the past two years our products has reached more than 30 countries in the world, Europe. South America. North America, southeast Asia, Africa, etc. We welcome all over the world with the best quality and lowest price friend common cooperation and common development!

After Sales Service

 1) Best quality in your requirement

 2)Competitive price in china market

 3)Mature technical support

 4)Professional logistic support

 5 )Full experience of large numberscontainers loading in chinese sea port

 6 )Fast shipment by reputed shipping line

 7) Packing with pallet as buyer's special request

 8) Best service after shipment.

 9) Cargoes together with container after-sales service available

 10) Full experience in export

 11)Raw materials from chinese origin                                                                  

FAQ

What is the way you ship?

Express: FedEx, UPS, EMS, DHL, USPS, TNT, DPD, Aramex etc

Our way of shipping the products is universal and secure.

The company name and other contents related to pharmacy are not written on the package slips.

The way of packing is regularly changed for a secure delivery.

The packages are small in order to avoid unwelcomed questions . If the order is big, then it will be divided into two or more packages

Can the packages be trackable?

YES, we provide tracking number and you can track on internet.

Where do you ship to?

Worldwide.

Do you offer domestic shipping/remail shipping?

Yes we can ship to USA/UK/Canada/Australia/Germany etc warehouse first then to you.

Do you ensure your packing , what about customs, what happens if the package is retained?

We concern a lot about our safety system, we pack the orders as secure as possible. If a package is seized at customs, reships of seized orders will be done provided you have a copy of the letter to show us. If you receive a seizure letter, please contact us immediately with a scanned copy of the seizure letter, and also a new address to have your order reshipped to.

Which payment options are available?

Bitcoin

Western Union

Bank wire

MoneyGram