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In these photocyclization processes, the configuration of the stereogenic phosphorus center dictates the sense of helical chirality. Thus, by starting from enantiomerically pure P\u2010menthylphosphole\u2010oxide units, this method affords enantiopure helical compounds. The helical phosphine oxides were characterized by X\u2010ray diffraction. After reduction of the phosphine\u2010oxides, the corresponding helical phosphines have been used as ligands in transition\u2010metal complexes. The X\u2010ray crystal structure of a gold chloride complex of a [6]helicene is reported.<\/jats:p>","DOI":"10.1002\/chem.201300844","type":"journal-article","created":{"date-parts":[[2013,6,13]],"date-time":"2013-06-13T07:36:57Z","timestamp":1371109017000},"page":"9939-9947","source":"Crossref","is-referenced-by-count":52,"title":["Heterohelicenes with Embedded P\u2010Chiral 1<i>H<\/i>\u2010Phosphindole or Dibenzophosphole Units: Diastereoselective Photochemical Synthesis and Structural 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