1,3-Migration of Trimethylsilyl Group from Carbon to Oxygen in Highly Sterically Hindered Silanol of the Type (Me 3 Si) 3 CSi(C 6 H 4 Me- p )MeOH and Reaction of the Related Iodide with Iodine Monochloride and Iodine Monobromide
作者:Kazem D. Safa、Fatemeh Mosleh、Parvaneh Kalantarzadeh
DOI:10.1080/10426500307890
日期:2003.6
related iodide (Me 3 Si) 3 CSi(C 6 H 4 Me- p )Mel reacts with ICI and IBr to give rearranged (Me 3 Si) 2 C(SiMe 2 X)Si(C 6 H 4 Me- p )Me 2 and unrearranged products (Me 3 Si) 3 CSi(C 6 H 4 Me- p )MeX, (X = Cl, Br) respectively. The rearranged bromide (Me 3 Si) 2 C(SiMe 2 Br)Si(C 6 H 4 Me- p )Me 2 reacts with a range of silver [I] salts AgY (Y = OOCCH 3 , SO 4 2 m ) and Mercury [II] salt HgY 2 (Y = OOCCH
硅烷醇 (Me 3 Si) 3 CSi(C 6 H 4 Me-p )MeOH 已被证明可异构化为 (Me 3 Si) 2 CHSi(C 6 H 4 Me-p )(Me)(OSiMe 3 )在室温下在 0.2 M NaOMe/MeOH 中保持 10 小时。在吡啶中回流26小时后,上述硅烷醇的相应异构化(得到(Me 3 Si) 2 CHSi(C 6 H 4 Me-p) (Me)(OSiMe 3 ))完成。该反应涉及在硅烷醇化物离子中从碳到氧的 1,3-迁移以产生碳负离子,该碳负离子迅速从溶剂中获得质子。在 Et 2 O/THF 中用 MeLi 处理 (Me 3 Si) 3 CSi(C 6 H 4 Me-p)MeOH,通过相同的重排得到有机锂试剂 (Me 3 Si) 2 CLiSi(C 6 H 4 Me) - p )(Me)(OSiMe 3 ) 用 Me 2 SiHCl 处理得到 (Me 3 Si)