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The Unexpected Reactions of Boron Trihalides with 7‐Phosphanorbornadiene Complexes
Author(s) -
Mei Yanbo,
Tian Rongqiang,
Duan Zheng,
Mathey François
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402847
Subject(s) - chemistry , boron , phthalic acid , medicinal chemistry , ring (chemistry) , derivative (finance) , phthalic anhydride , stereochemistry , polymer chemistry , organic chemistry , catalysis , financial economics , economics
The reactions of BX 3 (X = Cl, Br) with 7‐R‐7‐phosphanorbornadiene–M(CO) 5 (M = Mo, W) complexes ( 1 ) yields products 2 and 4 in which the RP–M(CO) 5 unit is inserted into one of the carboxyl units of the phthalic derivative as a result of the collapse of the bridge. When X = Br, 4 cyclizes to give new six‐membered heterocycles 5 with quasiplanar structures. When treated by an excess of BBr 3 , heterocycles 5 undergo ring contraction to afford five‐membered oxocyclic products 6 .
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