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Aluminium-oxygen rings

Single and Edge-Fused Aluminium-Oxygen Rings. 73... [Pg.67]

The n.m.r. characteristics of the isopropylidene acetals of the four possible types of ring A primary, secondary 1,3-glycol systems, exemplified by serratriol (178), lycoclavanol (179), methyl hederagenate (180), and methyl 3-epihederagenate (181), have been tabulated, and provide a useful means of differentiation.132 The reactions of the primary monotosylates of these four types provide further confirmation of stereochemistry.133 With potassium t-butoxide the cis types (178) and (181) afforded oxetans whereas the trans types (179) and (180) were converted into A-seco-aldehydes (182). Appreciable amounts of alkyl oxygen fission products were obtained on lithium aluminium hydride reduction of the monotosylates of (178), (180), and (181), presumably via participation of the 3-hydroxy-group, e.g. (183). [Pg.142]

See other pages where Aluminium-oxygen rings is mentioned: [Pg.147]    [Pg.65]    [Pg.633]    [Pg.131]    [Pg.84]    [Pg.80]    [Pg.90]    [Pg.105]    [Pg.88]    [Pg.339]    [Pg.293]    [Pg.360]    [Pg.71]    [Pg.102]    [Pg.105]    [Pg.108]    [Pg.128]    [Pg.130]    [Pg.131]    [Pg.413]    [Pg.104]    [Pg.222]    [Pg.694]    [Pg.454]    [Pg.771]    [Pg.223]    [Pg.46]    [Pg.144]    [Pg.384]    [Pg.152]    [Pg.36]    [Pg.398]    [Pg.244]    [Pg.90]    [Pg.95]    [Pg.299]    [Pg.319]    [Pg.191]    [Pg.404]    [Pg.62]    [Pg.771]    [Pg.203]    [Pg.246]    [Pg.255]    [Pg.263]   
See also in sourсe #XX -- [ Pg.147 ]



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