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Synthese von funktionalisierten Bi(cyclopropylidenen)
Author(s) -
Huwyler Rolf,
AlDulayymi Ahmad,
Neuenschwander Markus
Publication year - 1999
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/(sici)1522-2675(19991215)82:12<2336::aid-hlca2336>3.0.co;2-#
Subject(s) - chemistry , stereochemistry
Synthesis of Functionalized Bi(cyclopropylidenes) In view of the synthesis of attractive triafulvalene precursors 9 , a series of bi(cyclopropylidenes) 8 with vinyl‐ ( 8a ), alkoxycarbonyl ( 8c – f ), hydroxymethyl ( 8h ), as well as protected hydroxymethyl groups ( 8g , 8i ) have been prepared by simple one‐pot reactions of the corresponding 1,2‐dibromo‐cyclopropanes 6 with BuLi/CuCl 2 at −95°. First experiments towards a direct low‐temperature synthesis of bi(cyclopropylidenes) bearing good leaving groups 9k (X=AcO) and 9l (X=Br) are reported.