Thieno[3,2-b]benzofuran was synthesized starting from benzo[b]furan-3(2H)-one or benzo[b]furan-2-carbaldehyde. Electrophilic substitution reactions such as bromination, formylation, acetylation or nitration, take place in position 2. An electron donating group in position 2 directs further electrophilic substitution into positions 3 and 6, whereas compounds with an electron acceptor in position 2 are substituted exclusively in position 6. Metallation with butyllithium took place in position 2. The 1H and 13C NMR signals of the title compound were fully assigned.
噻吩[3,2-
b]
苯并呋喃是从苯并[
b]
呋喃-3(2
H)-酮或苯并[
b]
呋喃-2-甲醛开始合成的。亲电取代反应,如
溴化、甲酰化、乙酰化或硝化,发生在位置2。位置2处的电子给体基团将进一步的亲电取代引向位置3和6,而位置2处带有电子受体的化合物则仅在位置6上发生取代。丁基
锂的
金属化反应发生在位置2。该标题化合物的
1H和
13C NMR信号已完全被指定。