Sodium iodide, naming

Thus, to name just a few examples, a nucleophilic aliphatic substitution such as the reaction of the bromide 3.5 with sodium iodide (Figure 3-21a) can lead to a range of stereochemical products, from a l l mbrture of 3.6 and 3.7 (racemization) to only 3.7 (inversion) depending on the groups a, b, and c that are bonded to the central carbon atom. The ring closure of the 1,3-butadiene, 3.8, to cyclobutene... 

Conant and Lutz is a two-step process involving initial di-bromination of the diketone followed by ring closure with zinc and sodium iodide. The overall yield of traws-l,2-dibenzoyl-cyclopropane is approximately 15%. The submitters have extended the described method to the preparation of other frans-1,2-diaroylcyclopropanes, namely acidic hydrogens on both a-carbons. A probable mechanism for this transformation is as follows ... 

The melting point of anhydrous lithium iodide is 430°, according to W. Ramsay and N. Eumorfopoulos,15 446° 3 5° according to T. Carnelley, and 440° according to G. Scarpa. The first named also give 663° for the m.p. of sodium iodide ... 

To date, the sugar ring structure of only one desoxyribosyl nucleoside (namely, thymidine) is known. In 1935, Levene and Tipson - found that thymidine condenses with trityl chloride in the presence of dry pyridine to give a crystalline monotrityl-thymidine. From their previous proof of the structure of monotrityl-uridine as the 5-trityl ether, it seemed probable that the thymidine ether is 5-trityl-thymidine. This was confirmed by tosylation, to give tosyl-trityl-thymidine, followed by treatment with sodium iodide in acetone under standard conditions. 

Notet The name Anayodin is also used to designate sodium iodide. 

We will illustrate these rules by naming a few compounds. For example, the compound Nal is called sodium iodide. It contains Na (the sodium cation, named for the parent metal) and 1 (iodide the root of iodine plus -ide). Similarly, the compound CaO is called calcium oxide because it contains Ca (the calcium cation) and 0 (the oxide anion). 

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