{'fraction_non_alphanumeric': 0.011534025374855825, 'fraction_numerical': 0.0011534025374855825, 'mean_word_length': 6.547826086956522, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Arenetricarbonylchromium (0) complexes in organic synthesis

Activation of arene rings to deprotonation and nucleophilic addition by attachment of a tricarbonylchromium unit is combined with the or/Ao-directing effects of fluorine and other substituents to generate new methods for the highly regiocontrolled synthesis of polyfunctional aromatics and benzoannulated heterocycles. With chiral oxazolone electrophiles, these reactions occur without diastereoselection although subsequent reactions of the adducts show good selectivity. Lateral protection of protons adjacent to nitrogen and oxygen functions with bulky silane groups produces regioselective remote deprotonation by lithium bases in indole and phenol complexes. These selectivities are used to synthesize indoles functionalized in the carbocyclic ring and resorcinyl-benzofuran phytoalexins respectively.