Organosamariums: preparation using diiodosamarium and reactivity in tetrahydropyran
摘要:
Diiodosamarium prepared in tetrahydropyran reduces allylic, benzylic and alkyl halides at 0 or -15 degrees C to give organosamariums which are stable under these conditions. The reactivity of these organometallics has been explored, showing that they are very selective reagents. (C) 1998 Elsevier Science S.A. All rights reserved.
Generation and reactivity of allylic and benzylic samarium compounds using diiodosamarium in tetrahydropyran
作者:Béatrice Hamann-Gaudinet、Jean-Louis Namy、Henri B. Kagan
DOI:10.1016/s0040-4039(97)01506-2
日期:1997.9
Diiodosamarium prepared in THP reduces allylic iodides and bromides at 0 or -15 degrees C to give organosamarium compounds which are stable under these conditions. These allylic samarium compounds react with many functionalities including the keto group of keto esters. Benzylic samarium compounds were prepared similarly from benzylic bromides. (C) 1997 Elsevier Science Ltd.
Garcia Martinezi, Antonio; Oliver Ruiz, Manuel, Synthesis, 1984, # 7, p. 608 - 610
作者:Garcia Martinezi, Antonio、Oliver Ruiz, Manuel
DOI:——
日期:——
[EN] COPOLYMERS OF ETHYLENE AND/OR alpha-OLEFINS AND VICINALLY DISUBSTITUTED OLEFINS<br/>[FR] COPOLYMERES D'ETHYLENE ET/OU D'ALPHA-OLEFINES ET OLEFINES A DISUBSTITUTION VICINALE
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2004106394A1
公开(公告)日:2004-12-09
Substantially random ethylene and/or α-olefin copolymers containing units derived from vicinally disubstituted olefin monomers are described. The vicinally disubstituted olefin monomers may be represented by the generic formula (R1)CH=CH(R2), where R1 and R2 independently comprise hydrocarbyl or silyl-hydrocarbyl groups containing 1 or more carbon atoms, or may be linear, branched or cyclic substituted or unsubstituted hydrocarbyl groups having from 1-100 carbon atoms, or they may contain 30 or less carbon atoms. The copolymers may be prepared by coordination polymerization by means of contacting at least one vicinally disubstituted olefin monomer and ethylene and/or α-olefin, optionally with one or more other coordination polymerizable monomers, with a catalyst system comprising a monocyclopentadienyl heteroatom-containing Group 4 transition metal catalyst component.