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Borole Dianions: Metalation of 1‐(Dialkylamino)‐2,5‐dihydro‐l H ‐boroles and the Structure of Li 2 (C 4 H 4 BNEt 2 )·TMEDA
Author(s) -
Herberich Gerhard E.,
Hostalek Martin,
Laven Ralf,
Boese Roland
Publication year - 1990
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199003171
Subject(s) - metalation , lithium (medication) , dimer , chemistry , steric effects , boron , crystallography , crystal structure , base (topology) , stereochemistry , medicinal chemistry , inorganic chemistry , organic chemistry , medicine , mathematical analysis , mathematics , endocrinology
The dilithiated products 2 a, b are obtained from the 2,5‐dihydro‐lH‐boroles 1 a, b at room temperature if lithium 2,2,6,6‐tetramethylpiperidide (LiTMP) is used as base: with sterically less bulky lithium amides, borates are formed. 2b ·TMEDA is present in the crystal as a centrosymmetric dimer with two pentahapto‐bound Li atoms per unit.