作者:Kazuhiro Maruyama、Atsuhiro Osuka、Yoshinori Naruta
DOI:10.1246/bcsj.51.3047
日期:1978.10
The photochemical reaction of 3,3-dimethyl-1,2-indanedione (DMID) with xanthene was investigated in detail. The products are 1-hydroxy-3,3-dimethyl-1-(9-xanthenyl)-2-indanone (3a) (49%), 2-hydroxy-3,3-dimethyl-1-indanone (13%), 1,1′-dihydroxy-3,3,3′,3′-tetramethyl-1,1′-biindan-2,2′-dione (5a) (23%), and 9,9′-bixanthenyl (6) (49%). The reaction proceeds via hydrogen abstraction by 3(nπ)* of DMID leading to triplet radical pair composed of its semidione radical and 9-xanthenyl radical. The product 3a is a combination product from the radical pair, while 5a and 6 are escaping products from it. The hydrogen abstraction occurs at C-1 carbonyl group of DMID in a fairly efficient quantum yield (Φ=0.71). Behavior of the DMID semidione radical is rather resemble those of open-chain semidione radicals than those of sterically hindered semidione radicals.
详细研究了3,3-二甲基-1,2-茚满二酮(DMID)与氧杂蒽的光化学反应。产物为1-羟基-3,3-二甲基-1-(9-氧杂蒽基)-2-茚满酮(3a)(49%)、2-羟基-3,3-二甲基-1-茚满酮(13%)、1,1′-二羟基-3,3,3′,3′-四甲基-1,1′-联茚满-2,2′-二酮(5a)(23%)和9,9′-双氧杂蒽(6)(49%)。反应通过DMID的3(nπ)*氢