1-Boc-3-苯基哌啶-4-酮 、 Bredereck 试剂 在
甲苯 作用下,
反应 2.0h,
以to yield the title compound (215 mg, 188%) as a brown oil which的产率得到3-[1-dimethylaminometh-(Z)-ylidene]-4-oxo-5-phenylpiperidine-1-carboxylic acid tert-butyl ester
The invention relates to compounds of formula
wherein R
1
, R
2
, R
3
, R
4
, X and Y are as defined herein and to pharmaceutically active acid addition salts thereof.
The compounds can be used for the treatment of Alzheimer's disease, cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-infarct dementia, dementia pugilistica or Down syndrome.
The invention relates to compounds of formula
wherein R1, R2, R3, R4, X and Y are as defined herein and to pharmaceutically active acid addition salts thereof. The compounds can be used for the treatment of Alzheimer's disease, cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-infarct dementia, dementia pugilistica or Down syndrome.