《Synthesis of tetra(BINOL) substituted spirobifluorenes》 was published in Synthesis in 2002. These research results belong to Lutzen, Arne; Thiemann, Frank; Meyer, Sven. Name: (R)-3,3′-Diiodo-2,2′-bis(methoxymethoxy)-1,1′-binaphthalene The article mentions the following:
A series of tetra(BINOL) substituted spiro-bifluorenes was prepared via four-fold Sonogashira cross-coupling reaction from 2,2′,7,7′-tetraiodospirobifluorene and 2,2′-bis(methoxymethoxy)-3-ethynyl-1,1′-binaphthyl or 2,2′-bis(methoxymethoxy)-3-ethynyl-3′-[(trimethylsilyl)ethynyl]-1,1′-binaphthyl. The conventional Sonogashira catalyst system did not provide good yields; a catalyst system of tris(dibenzylideneacetone) dipalladium(0) [Pd2(dba)3].CHCl3, CuI, trimesitylphosphine [PMes3], and tetrabutylammonium iodide [n-Bu4NI] was used with excellent results. Whereas the deprotection of the readily available methoxymethyl ether protected precursors proved to be difficult in the case of the sterically shielded spirobifluorenes, the not-further substituted tetra(BINOL) could be obtained in good yield after acidic hydrolysis. This chiral spirobifluorene closely reassembles the structure of copper(I) or silver(I) complexes of a bis(BINOL) substituted 2,2-bipyridine and can also form two clefts with the BINOL groups oriented in a fashion potentially useful for the co-operative mol. recognition of chiral substrates. In the experimental materials used by the author, we found (R)-3,3′-Diiodo-2,2′-bis(methoxymethoxy)-1,1′-binaphthalene(cas: 189518-78-3Name: (R)-3,3′-Diiodo-2,2′-bis(methoxymethoxy)-1,1′-binaphthalene)
(R)-3,3′-Diiodo-2,2′-bis(methoxymethoxy)-1,1′-binaphthalene(cas: 189518-78-3) belongs to organic iodides. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. Alkyl iodides react at a faster rate than alkyl fluorides due to the weak C-I bond.Name: (R)-3,3′-Diiodo-2,2′-bis(methoxymethoxy)-1,1′-binaphthalene
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com