10.10- diiodo

A novel and highly efficient synthesis of 1,1-diiodo-, 1,1-dibromo-, and mixed (Z)- or ( )-1-iodo-l-bromo-l-alkenes using the 1,1-heterobimetallic reagents obtained by hydrozirconation of stannylacetylenes has also been described [155], The hydrozirconation and halo-genolysis steps were carried out at room temperature in THF under a nitrogen atmosphere. It is noteworthy that the developed route is compatible with various functionalities... 

A synthesis of potentially useful 1-iodo-l-bromo-l-alkenes has thus been developed that offers complete stereocontrol. These methods have also proven to be highly efficient for the preparation of 1,1-diiodo-l-alkenes and 1,1-dibromo-l-alkenes, which are very useful synthetic intermediates (Scheme 7.26) [155]. 

Diiodine trioxide, derivatives of, 5 76-77 1,1 -Diiodo-3,4-benzo-1 -telluracyclopentane, 35 246... 

The second approach to the preparation of 1-telluracyclohexane involves the reaction of 1,5-diiodopentane with elemental tellurium under heating (45JCS11). Initially formed (in 63% yield) 1,1-diiodo-l-telluracyclohexane 6 (X = I) is readily reduced to 1 by potassium metabisulfite in almost quantitative yield. 

Soc. Perkin Trans. 11998, 2413-2423. Barluenga, J. Rodriguez, M. A. Campos, P. J. Asensio, G. Synthesis of 2-functionalized 1,1-diiodo-l-alkenes. Generation and reactions of... 

Diodo-l-alkenes.1 This reagent (1) in combination with a wide variety of nucleophiles reacts with 1-iodoalkynes to afford 2-substituted 1,1-diiodo-l-alkenes (2) in 50-85% yield. The products can be converted to a variety of alkenes by reaction of both the iodine atoms.2... 

Tcllurolan-diid l,l-Dichloro-1,1-diiodo- El2b, 669(R2TeI2 + Cl )... 

C5H10I2 1,1 -diiodo-2-methylbutane 66688-50-4 499.20 43.345 2 5484 C5H10OS 2-methyltetrahydrofuran-3-thiol, mixed isome 57124-87-5 443.15 38.450 1.2... 

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