ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Reactions of Cyclopropenes, V1) Cyclooligomerisations of 3,3-Dialkylcyclopropenes at Palladium (0) CatalystsAt Phosphane free palladium(0) catalysts 3,3-dialkylcyclopropenes [3-ethyl-3-methylcyclopropene (2), 3,3-diethylcyclopropene (3), and spiro[4.2]hept-1-ene (4)] are cyclooligomerised to give the trans-tricyclo[3.1.0.02,4]hexane derivatives 6, 7, and 9, and the pentacyclo[9.1.0.02,4.05,7.08,10]-dodecane derivatives 10, 11, and 12. Contrary to this at triisopropylphosphane modified palladium(0) catalysts the tetracyclo[6.1.0.02,4.05,7]nonane derivatives 14, 15 and 16 are formed selectively in more than 80% yield.
Notes:
3,3-Dialkylcyclopropene [3-Ethyl-3-methylcyclopropen (2), 3,3-Diethylcyclopropen (3) und Spiro 4.2]hept-1-en (4) reagieren an phosphanfreien Palladium (0)-Katalysatoren zu den entsprechenden trans-Tricyclo[3.1.0.02,4]hexan-Derivaten 6, 7 bzw. 8 und zu den Pentacyclo-[9.1.0.02,4.05,7.08,10]dodecan-Derivaten 10, 11 und 12. Triisopropylphosphan-haltige Palladium-(0)-Katalysatoren liefern dagegen selektiv die Tetracyclo[6.1.0.02,4.05,7]nonan-Derivate 14, 15 und 16 mit über 80% Ausbeute.
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19811140508
