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[4 + 2]‐Cycloadditionen von Halogenthiazylen an 2‐Chlorpentafluor‐1,3‐butadien
Author(s) -
Boese Roland,
Haas Alois,
Heβ Thomas
Publication year - 1993
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19931260705
Subject(s) - chemistry , yield (engineering) , derivative (finance) , crystal structure , stereochemistry , medicinal chemistry , oxide , crystallography , organic chemistry , materials science , economics , financial economics , metallurgy
[4 + 2] Cycloadditions of Halogeno Thiazyls with 2‐Chloropentafluoro‐1,3‐butadiene Reactions of (XSN) n ( n =3, 1; X=Cl, F) with 2‐chloropentafluoro‐1,3‐butadiene provide the 1λ 4 ,2‐thiazines 1a and 1b . Fluorination with KF converts 1a in 88% yield to 1b . CH 3 OH reacts with 1b to form the 1‐methoxy derivative 1c . The structure of 1c was determined by single‐crystal X‐ray diffraction analysis. With water 1a forms the 1,2‐thiazin‐3‐one 1‐oxide 2.