Synthesis of photochromic dihetarylethenes with a cyclopentenedione bridge fragment
摘要:
Dihetarylsubstituted furanones 1 treated with sodium methylate undergo rearrangement to cyclopentenediones 2, the alkylation of which leads to corresponding photochromic derivatives 3.
Synthesis and properties of dihetaryl-substituted furanones. Synthesis of photochromic dithienylethenes containing a furanone bridging fragment
摘要:
The reaction of 2,5-dimethylthiophen-3-ylacetic acid with 2,5-dimethylthiophen-3-ylacetyl chloride gave 3,4-bis(2,5-dimethylthiophen-3-yl)furan-2(5H)-one which was converted into a series of 5-methylidene and 5-arylmethylidene derivatives.