Methyl 4-cyclopentyl-2,4-dioxo-butanoate

CAS 1340564-45-5, Methyl 4-cyclopentyl-2,4-dioxo-butanoate, is a C10H14O4 ester – the protected form of the corresponding acid.

The ester is the protected form of the acid: it survives steps the free acid would not, and is cleaved when the acid is wanted. The ring constrains the geometry of the fragment, so the entry is bought for the shape it imposes on the rest of the molecule rather than for a single reactive site.

The formula C10H14O4 resolves to 10 carbons with 4 oxygens. A 10-carbon chain sits between volatility and lipophilicity, which is the range most often used when a fragment has to stay in the organic phase without being waxy.

Handling and storage

Esters hydrolyse slowly in the presence of moisture, so the lot is stored dry and away from bases.

Ordering

The unit weights held are 1kg / 25kg / 100kg. A split shipment across two of those sizes is treated as one lot and one certificate. Where a specification has to be met on paper before shipment, it is agreed in writing and the lot is qualified against it rather than against the catalogue text.