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Synthesis and phosphorylating properties of 2‐chloro‐2,3‐dihydro‐3‐(methylsulfonyl)‐1,3,2‐benzoxazaphosphole 2‐oxide. Derivatives with chloro substituents on the benzene ring
Author(s) -
Hünsch Sabine,
Richter Wolfgang,
Ugi Ivar,
Chattopadhyaya Jyoti
Publication year - 1994
Publication title -
liebigs annalen der chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 0170-2041
DOI - 10.1002/jlac.199419940308
Subject(s) - chemistry , phosphole , phosphoric acid , reagent , cleavage (geology) , benzene , ring (chemistry) , phosphorylation , medicinal chemistry , oxide , organic chemistry , biochemistry , geotechnical engineering , fracture (geology) , engineering
The synthesis and the use of the five‐membered cyclic phosphorylating agents 1a–c are described. Their difunctional phosphorylating properties towards alkanols and hydroxylated amino acids and the cleavage reaction of the formed phosphoric acid triesters to diesters with oximate or platinum/hydrogen are investigated and compared to the “parent” compound 2‐chloro‐2,3‐dihydro‐3‐(methylsulfonyl)‐1,3,2‐benzoxazaphosphole 2‐oxide. Dichlorobenzoxazaphosphole 1b is the most reactive of these reagents with respect to phosphorylation with ring opening and oximate cleavage of the phosphoric acid triesters, followed by o ‐chlorobenzoxazaphosphole 1a , the unsubstituted phosphole I , and p ‐chlorobenzoxazaphosphole Ic .