{'fraction_non_alphanumeric': 0.02249718785151856, 'fraction_numerical': 0.015748031496062992, 'mean_word_length': 5.223776223776224, '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}}
Synthesis of Vitamin K1 and K1‐Chromanol by Friedel–Crafts Alkylation in Heterogeneous Catalysis

The partly hydroxylated MgF2 and AlF3 materials are efficient and selective catalysts for the preparation of two important members of the vitamin K class: vitamin K1 and vitamin K1‐chromanol. The high activity in combination with high selectivity in one of the target products is due to both the acidic strength and the synergistic effect of the presence of both, optimized Brønsted and Lewis sites. Therefore, the best catalyst for a target product can be obtained through a very simple tuning of the acidic properties of the material. Moreover, the results obtained in the present study (Yvitamin K1=57.8 % and Yvitamin K1‐chromanol=71.4 %) are also very encouraging from the environmental standpoint as green elements are introduced by using solid catalysts and a biphasic solvent system.