ID
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
C2H2 hydrogenation Last month, Clariant (Munich, Germany; www.clariant.com) launched OleMax…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUS
6. Honeywell-MicroPressureMPRSeriesSensorFocus on Sensors
Hygienic optical sensor measures dissolved oxygen The Memosens COS81D hygienic…
NEW PRODUCTS + Show More SHOW PREVIEWS

Comment

‘One-pot’ synthesis of conjugated polyenes

By Tetsuo Satoh |

The research group of professor Masafumi Hirando at Tokyo University of Agriculture and Technology (TUAT; Koganei City, Japan; www.tuat.ac.jp) has performed the world’s first one-pot synthesis of conjugated polyenes, which normally require at least seven steps by conventional methods. This shortens the synthesis time from around a week to as little as 30 minutes. Waste generation is virtually eliminated due to the hydrogen transfer reaction, which enables regio- and stereo-selective reactions for making precursors for electronics chemicals, vitamins and pharmaceuticals. At room temperature, the new synthesis approach directly produces conjugated tetraenes with 85% yield by reacting 1,3-butadiene over a Ru(0) catalyst containing two internal alkyne ligands. The stoichiometric reaction of [Ru(η4-cisoid-1,3-butadiene)(η4-1,5-COD)(NCMe)] with two equivalents of 3-hexyne produces a tetraene complex of Ru(0), [Ru{3–6-η4-(3E,5E,7E,9E)-4,9-diethyldodeca-3,5,7,9-tetraene}(η4-1,5-COD)(NCMe)], in 98% yield. When exposed to 1,3-butadiene, the conjugated tetraene ligand is released with 92% yield. The study is described in a recent issue of Organometallics.
Related Content
DeNOx catalyst operates at lower temperatures
Professor Toru Murayama at Tokyo Metropolitan University (Tokyo, Japan; www.haruta-masatake.ues.tmu.ac.jp), in collaboration with Chugoku Electric Power Co., Inc., has developed…
A new hydrotreating catalyst
Hydrotreating is an important petroleum refining process in which sulfur and other contaminants are removed in the manufacture of transportation…
A Spotlight on Catalyst Supports
Fundamental research, using a huge arsenal of analytical and material-characterization tools, is yielding new and improved catalyst supports Readers of…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
ABB Ability™ technology to transform BASF rotating equipment into intelligent machinery and improve uptime and reliability
Detect and correct anomalies early in your batch processes
ABB at ACHEMA 2018
The Future of Project Execution
Digitalization: What does it deliver today… and tomorrow?

View More

Live chat by BoldChat