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221056-83-3

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221056-83-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221056-83-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,5 and 6 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221056-83:
(8*2)+(7*2)+(6*1)+(5*0)+(4*5)+(3*6)+(2*8)+(1*3)=93
93 % 10 = 3
So 221056-83-3 is a valid CAS Registry Number.

221056-83-3Downstream Products

221056-83-3Relevant academic research and scientific papers

Total synthesis of (±)-Wortmannin

Mizutani, Takashi,Honzawa, Shinobu,Tosaki, Shin-ya,Shibasaki, Masakatsu

, p. 4680 - 4682 (2002)

A potent and specific phosphoinositide 3-kinase inhibitor (±)-wortmannin has been achieved through an intramolecular Heck reaction for the construction of an allylic quaternary carbon center and a diosphenol-Claisen rearrangement (see scheme). SEM = 2-(Tr

Synthetic studies on (+)-wortmannin. An asymmetric construction of an allylic quaternary carbon center by a Heck reaction

Honzawa,Mizutani,Shibasaki

, p. 311 - 314 (1999)

Treatment of (±)-4 with Pd(OAc)2, DPPP, TBAB and K2CO3 in toluene gave 16β in a highly stereoselective manner (17:1, 90%). Moreover, reaction of(±)-4 with Pd(OAc)2, (R)-Tol-BINAP and K2CO3 in toluene afforded 16β in 96% ee and in 20% yield.

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