PHOTOINDUCED [6 + 2] CYCLOADDITIONS OF ALKYNES TO TRICARBONYL(CYCLOHEPTATRIENE)CHROMIUM(0)

被引：51
|
作者：
CHAFFEE, K [1 ]
SHERIDAN, JB [1 ]
AISTARS, A [1 ]
机构：
[1] RUTGERS STATE UNIV, DEPT CHEM, NEWARK, NJ 07102 USA
来源：
ORGANOMETALLICS | 1992年 / 11卷 / 01期
关键词：
D O I：
10.1021/om00037a010
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Photolysis of [(eta(6)-C7H8)Cr(CO)3] (1) and RC = CR (2a, R = Ph; 2b, R = Tol) in toluene or n-hexane results in the formation of [(eta(2): eta(4)-C9H8R2)Cr(CO)3] (3a,b) in 70-85% isolated yield via a [6 + 2] cycloaddition reaction. Heating 3a,b in toluene gives the bicyclo [4.2.1]-nona-2,4,7-trienes 4a,b and [(eta-C6H6Me)Cr(CO)3]. Photolysis of 1 and excess DMAD (dimethyl acetylenedicarboxylate, 5) in toluene at 0-degrees-C yields the bicyclotriene 4c as the major product and small amounts of the arene C6(CO2Me)6 and the [4 + 2] cycloadduct between 4c and 5.
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页码：18 / 19
页数：2
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