Hans v. Pechmann †

Pechmann reaction promoted by boron trifluoride dihydrate.

The Pechmann reaction of substituted phenols 1a-e with methyl acetoacetate (2) can be activated by boron trifluoride dihydrate (3) to give the corresponding 4-methyl- coumarin derivatives 4a-e in excellent yield (98-99 %).

Hans Arnold Heilbronn 1908-1975 Hans

Hans Meinhardt

Hans Meinhardt is a theoretical developmental biologist working at the Max-Planck-Institute for Developmental Biology in Tübingen. He has pioneered the use of mathematical modelling of embryonic pattern formation. He received his PhD from the University of Cologne in Physics. For a postdoctoral fellowship, he went to the European High Energy Laboratory CERN at Geneva. By collaborating in an exp...

Chair : Hans

Editorial Hans

European Journal of Information Systems (2008) 17, 555–556. doi:10.1057/ejis.2008.58 It is my pleasure to write the editorial for the last issue of this year of the European Journal of Information Systems (EJIS). This issue contains no less than nine papers. It is my privilege to introduce them below. We are starting off this issue with a paper from Thompson Teo and Bing Men on knowledge portal...