133329-83-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133329-83-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,3,2 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 133329-83:
(8*1)+(7*3)+(6*3)+(5*3)+(4*2)+(3*9)+(2*8)+(1*3)=116
116 % 10 = 6
So 133329-83-6 is a valid CAS Registry Number.
133329-83-6Relevant articles and documents
An enantioselective synthesis of the C(10) to C(20) fragment of FK506
Maier,Schoffling
, p. 53 - 56 (1991)
The synthesis of the C(10) to C(20) fragment 4 of FK506 from (4S)-4-[(tert-butyldimethylsilyl)-oxymethyl]-4-butanolide (9) is described. A key reaction is the chelation controlled addition of 2-lithio-4-methyl-furan (15b) to aldehyde 8.
