Heterocyclic Substituted Tetraorganogermanes

Heterocyclic substituted tetraorganogermanes are prepared by introduction of the cyclic moiety with organolithium derivatives (l) by forming the heterocycle in a side chain reaction with diazoalkane (II) or by dehydration with hydrogen sulfate (III). The compounds are prepared by methods in the following scheme and are compiled in Table k on page 19- 

R hydrogen or organic group, may be different in a molecule, R heterocyclic group, M = sodium or potassium. One thiophene derived bis(triorgano-germane) and is listed in Chapter 2. .1.1.3- 

By rxn. of MesGel with CH2 CHLi in Et20, in 52% yield (1579) with CH2 CHBr and Na in Et20 in presence of cat. EtOAc, in 27% yield (1579) with CH2 CHMgBr in THF, in 18% yield (1579)  

with BuLi relative rate of nucleophilic substitution (2629)  

AC2O2 relative reactivity capturing Me-radicals (263O). 

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