Isocyclics reductive

This compound, tentatively 9-oxy-deoxo-mesopyropheophorbide-a, is of interest as it offers a clue as to the mode of loss of the 9-ketone moiety inherited from chlorophyll-a. That is, it now appears that the 9-keto function is reduced to the alcohol which may then be dehydrated. If this were to occur, the product would contain a highly strained 6,Y-cycloetheno moiety. Most likely, concerted or subsequent and rapid reduction would follow and result in the common 6,Y-cycloethano type of isocyclic ring found in geoporphyrins of the DPEP-series. [Pg.119]

Reductive ring expansion of isocyclic carbinols by one C-atom... [Pg.472]

Cesiu)n,potassium,sodium Reactions with cesium alloys Reductive ring closure to isocyclics... [Pg.24]

Sodium liq. ammonia Reductive ring opening of isocyclics... [Pg.26]

Selective ring hydrogenation of isocyclics s. 13, 74 Reductive furan ring opening s. U, 74... [Pg.35]

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