Shumaila, Abdullah M. A. published the artcileDiastereoselective synthesis of tetrasubstituted-octahydro-3,6-diazacarbazoles and tetrasubstituted-3,6-diazacarbazoles via double Pictet-Spengler reaction, Category: catalysis-chemistry, the publication is Tetrahedron Letters (2011), 52(21), 2661-2663, database is CAplus.
Pictet-Spengler condensation of 2,5-bis(2-phenyl-1-aminoethyl)pyrrole using glacial acetic acid afforded only one diastereomer of unreported tetrasubstituted-octahydro-3,6-diazacarbazoles, e.g. I. These were readily dehydrogenated to tetrasubstituted-3,6-diazacarbazoles, e.g. II. The stereoselectivity in the Pictet-Spengler reaction has been demonstrated using single crystal X-ray anal.
Tetrahedron Letters published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C6H8O6, Category: catalysis-chemistry.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia