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1‐Oxa‐3‐aza‐2,4‐disilacyclobutanes − Synthesis, X‐ray Structures, and Reactivity
Author(s) -
Klingebiel Uwe,
Noltemeyer Mathias
Publication year - 2001
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 - 10.1002/1099-0682(200107)2001:7<1889::aid-ejic1889>3.0.co;2-6
Subject(s) - chemistry , disiloxane , silanol , lithium (medication) , reactivity (psychology) , ring (chemistry) , medicinal chemistry , derivative (finance) , silicon , stereochemistry , organic chemistry , catalysis , medicine , alternative medicine , pathology , financial economics , economics , endocrinology
Lithium aminodi( tert ‐butyl)silanolate reacts with F 3 SiR to give the aminosiloxane (Me 3 C) 2 SiNH 2 −O−SiF 2 R [ 1 ; R = 2,4,6‐( t Bu) 3 C 6 H 2 ]. In the reaction of 1 with BuLi a four‐membered (Si−O−Si−NH) ring system 2 is formed [−(Me 3 C) 2 Si− O−SiFR−NH−]. The amino‐1,3‐disiloxane RSiF 2 −NH−Si(CMe 3 ) 2 −O−SiF 2 R ( 3 ) is obtained from dilithiated amino(di‐ tert ‐butyl)silanol and F 3 SiR. Compound 1 reacts with BuLi with formation of a dimeric lithium derivative through the Li−N bond ( 4 ). In 4 the transannular Si ··· Si distance was found to be 237.2 pm, which is the shortest distance so far found between two silicon atoms contained in four‐membered rings. Compound 4 reacts with Me 3 SiOSO 2 CF 3 with substitution of the lithium by the Me 3 Si group to give 5 .