By Houben J., Weyl T.
Methoden der Organischen Chemie (Methods of natural Chemistry, referred to as Houben-Weyl) is a customary reference paintings for chemists engaged in natural synthesis. In volumes on compound sessions, together with all Supplemental volumes, preparative tools are handled comprehensively and significantly. Tables of examples evaluate crucial equipment and convey their scope. targeted experimental tactics are given for the easiest equipment. The reactivity and extra reactions of every compound category also are offered. The broad use of formulation schemes help in making the German-language volumes extra conveniently comprehensible to non-German readers.
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Extra info for Houben-Weyl Methods in Organic Chemistry: Carboxylic Acid, Derivates
Mclnnisand D. M. Michno, in P. ), Rearrangements in Ground and Excited States, vo!. 3, Academic Press (1980). Photochemical rearrangements of trienes are described here, especially electrocyclic reactions and related processes. H. E. Zimmerman, in P. ), Rearrangements in Ground and Excited States, vo!. 3, Academic Press (1980). The di-:n;methane rearrangement is reviewed extensively and its mechanism discussed. A. C. Weedon, in W. M. ), Synthetic Organic Photochemistry, Plenum (1984). This review covers the use of enone photochemical cycloadditions in organic synthesis, with extensive tabulated data and many synthetic strategies.
32) that could also be a precursor to fulvene; bicyclohexadiene is probably produced from the second excited singlet state. For some other aromatic compounds the electronic nature of S1 and S2 may be reversed, or at least the states are much closer in energy, so that the preference for benzvalene or bicyclohexadiene formation under conditions of long-wavelength irradiation can be rationalized. 33) and anthracenes; for naphthalenes, as for benzenes, the extent of steric crowding helps to determine which type of valence isomer predominates, since there is more severe interaction in the bicyclohexadiene products than in the benzvalene products.
16), and this is a very effective way of making specifically deuterated aromatic compounds. A radical-anion mechanism is feasible for such a reaction, although direct homolytic cleavage of the carbon-halogen bond is considered to be more likely. 17) that can ariseas by-products in the production ofchlorinated phenolsforweedkillers such as 2,4,5-T, to less heavily substituted (and less toxic) com- 85 (named after its thermal counterpart, the Fries reaction). Typically, irradiation of a phenyl ester of a carboxylic acid leads to homolytic cleavage of the acyl-oxygen bond, and the resultant radicals recombine by formation of acyl to ring-carbon bonds.
Houben-Weyl Methods in Organic Chemistry: Carboxylic Acid, Derivates by Houben J., Weyl T.