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DBU ‐ nicht einfach nur eine starke Base: Eine Eintopfreaktion für ein polycyclisches Ringgerüst mit Diphosphet ‐ Grundstruktur unter Einbeziehung von doppelt deprotoniertem DBU
Author(s) -
Karsch Hans H.,
Rupprich Thomas,
Heckel Maximilian
Publication year - 1995
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19951280919
Subject(s) - chemistry , deprotonation , ring (chemistry) , stereochemistry , base (topology) , molecule , medicinal chemistry , polymer chemistry , organic chemistry , ion , mathematical analysis , mathematics
DBU ‐ Not Simply a Strong Base: A One‐Pot Synthesis of a Polycyclic Framework Consisting of a Diphosphete Central Unit and Two Units of Doubly Deprotonated DBU Two condensed five‐, six‐ and seven‐membered rings are fused in a spirocyclic fashion with a central four‐membered diphosphete ring in 4 , which unexpectedly is formed in a simple two‐component‐one‐pot reaction from Cl 2 P‐CH(SiMe 3 ) 2 and DBU. The latter is doubly deprotonated and acts as a bridge via C‐6 and N‐8 to a P‐P unit. The polyheterocycle 4 crystallizes in two modifications, whose molecular structures are almost identical.