Photocyclo addition

Keywords acenaphdiylene, tetracyanoethylene, CT complex, [2+2]photocyclo-addition, cyclobutane... 

Buu Hue, B.T., Dijkink, J., Kuiper, S.v., Schaik, S.v., Maarseveen, J.H., and Hiemstra, H. (2006) Synthesis of the tricyclic core of solanoeclepin a through intramolecular [2 + 2] photocyclo-addition of an allene butenolide. European Journal of Organic Chemistry, 127-137. 

Regio- and stereochemistry of Paterno-Buchi photocyclo additions of carbonyl compounds and cyclic vinyl ethers leading to formation of oxetanes 04ACR919. 

Tlie second example of such an asymmetric synthesis involves a (2+2)-photocyclo-addition reaction in a two-component single crystal. A mixed crystal of the diphenyl-butadiene shown in Scheme 5 with its thiophene analog was irradiated with light absorbed only by the latter. One of the enantiomeric heterodimers was produced in excess [8]. 

Winkler, J.D., Siegel, M.G., and Stelmach, (,E, (1993) A highly stereoselective approach to the synthesis of the manzamine alkaloids via the intramolecular vinylogous amide photocyclo-addition. Tetrahedron Lett., 34, 6509-6512,... 

Ghosh, S., Patra, D., and Samajdar, S., Intramolecular [2 +2 ]-photocyclo-addition-cyclobutane rearrangement. A novel stereocontrolled approach to highly substituted cyclopentanones. Tetrahedron Lett., 37, 2073, 1996. 

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