JAYASURIYA N.; KAGAN J., HETEROCYCLES, 24,(1986) N 10, 2901-2904
作者:JAYASURIYA N.、 KAGAN J.
DOI:——
日期:——
GRONOWITZ S.; SVENSSON A., ISR. J. CHEM., 27,(1986) N 1, 25-28
作者:GRONOWITZ S.、 SVENSSON A.
DOI:——
日期:——
A facile preparation of 2- and 5-substituted 3-bromothiophenes
作者:T. Masquelin、D. Obrecht
DOI:10.1016/s0040-4039(00)78549-2
日期:1994.12
Acetylenic ketones of type 4 and acetylenic acetals of type 6 (Scheme 1) are excellent cyclization precursors for the acid-catalyzed synthesis of various heterocycles. Using this methodology, 5- and 2-substituted 3-bromothiophenes of types 7 and 8 have been prepared in good to excellent yields.