{'fraction_non_alphanumeric': 0.03536693191865606, 'fraction_numerical': 0.0035366931918656055, 'mean_word_length': 5.658823529411765, '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}}
Organocatalyzed Phospha-Michael Addition: A Highly Efficient Synthesis of Customized Bis(acyl)phosphane Oxide Photoinitiators.

The addition of the P-H bond in bis(mesitoyl)phosphine, HP(COMes) 2 (BAPH), to a wide variety of activated carbon-carbon double bonds as acceptors was investigated. While this Phospha-Michael addition does not proceed in the absence of an additive or catalyst, excellent results were obtained with stoichiometric basic potassium or caesium salts. Simple amine bases can be employed in catalytic amounts and especially tetramethylguanidine (TMG) is an outstanding catalyst which allows to prepare bis(acyl)phosphines, R-P(COMes) 2 , under very mild conditions in excellent yields in short time. All phosphines RP(COMes) 2 can subsequently be oxidized to the corresponding bis(acyl)phosphane oxides, RPO(COMes) 2 , a substance class belonging to the most potent photoinitiators for radical polymerisations known to date. Thereby a simple and highly atom economic method was found, which allows to prepare a broad range of photoinitiators adapted to their specific field of application even on large scale.