Organocatalytic Domino-methylenation/Diels-Alder Reactions

<正>1 Results Organocatalytic reactions are currently very much en vogue as the term implies a connotation of ecologically benign chemistry.In addition,beautiful new results have been achieved over the last few years which triggered a dramatic increase in publications[1].Related to this topic is the catalysis of organic transformations by hydrogen bond donors and organic Brnsted acids[2].From an industrial point of view,these reactions can be beneficial when performed in water in high concentration,prerequisite,the work-up of the organic phase does not need additional amounts of organic solvents.