The Vespiary

The Hive => Novel Discourse => Topic started by: ClearLight on November 13, 2002, 12:12:00 PM

Title: Chinese Microwave red. of Ketones w/ NaBH4
Post by: ClearLight on November 13, 2002, 12:12:00 PM

The chinese use a household oven, here is the link to the article, perhaps some one can figure out how to capture it for Rhod's page..

http://nr.stic.gov.tw/ejournal/ChiChemSociety/1999/EJ52-1999-509.tif (http://nr.stic.gov.tw/ejournal/ChiChemSociety/1999/EJ52-1999-509.tif)

  I believe that the large excess of NaBH4 is because they keep trying to do it on a substrate without any liquid, ie: dry conditions... it would probablly work better on a substrate in a liquid suspension...

---

Infinite Radiant Light - THKRA

Title: NaBH4 microwave.
Post by: Rhodium on November 13, 2002, 12:46:00 PM

It is available in PDF from the homepage of J. Chin. Chem. Soc. too.

http://www.sinica.edu.tw/~ccswww/zj-OR-1999-P509.pdf (http://www.sinica.edu.tw/~ccswww/zj-OR-1999-P509.pdf)

Title: Microwave chemistry is mostly a gimmick, IMHO.
Post by: terbium on November 13, 2002, 08:13:00 PM

it would probablly work better on a substrate in a liquid suspension...
And it would probably work even better in methanol at room temperature.

---

Baseline Does Not Exist.

Title: PDF
Post by: ClearLight on November 14, 2002, 10:37:00 AM

Thx! I couldn't get that stupid quicktime plugin to give me more that one page...

---

Infinite Radiant Light - THKRA

Title: You know there was n article I read where they
Post by: SPISSHAK on November 16, 2002, 05:31:00 PM

doing similar reactions (reductive aminations of ketones) using this system on clay, or zeolit supports in a microwave.
Anyway the chemist would place a bowl filled with dry ice/alcohol slush on top of the beaker while the mix was being microwaves when dealing more volitile amines to recondense them.